China Government Procurement Network
The Corps Unified Procurement Center will procure the mobile satellite communication system for the Corps Public Security Bureau. Below are the equipment names and technical parameters provided by the purchaser. If there are any unclear technical parameters or concerns regarding brand-specific technical parameters, please contact the Corps Unified Procurement Center in writing (including the supplier's name, contact person, and phone number). Contact phone numbers: 0991-2362020, 2362017; Fax: 0991-2362018.
Technical Requirements for the "Dongzhongtong" Satellite Communication System of the Xinjiang Production and Construction Corps Public Security Bureau
Chapter One
One,Overview
In 2009, our bureau equipped a "Mobile Satellite" communication vehicle along with a satellite ground station, which played an important role in emergency communication support work. To adapt to the requirements of future emergency response situations, it is essential to strengthen the emergency communication support capabilities of the Corps Public Security. In line with the current situation of the Corps, we propose to equip each of the Public Security Bureaus of the Third and Fourth Agricultural Divisions with a "Mobile Satellite" communication vehicle to enhance the emergency communication support capabilities of grassroots public security agencies.
Two,System Construction Objectives
The "Mobile Communication" satellite communication vehicle, once equipped, can ensure the functionality of uploading images, voice, and data from the scene of emergencies within the jurisdiction of the Public Security Bureau of the Third and Fourth Agricultural Divisions. When necessary, it can mobilize the "Mobile Communication" units from both organizations to complete the image upload tasks for major emergencies. Additionally, it can facilitate emergency command and dispatch, as well as communication support for significant emergencies, major security activities, and disaster rescue operations.
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3. Principles of System Construction
1、 Principle of Advancement:Select high-reliability electronic communication equipment, auxiliary support devices, as well as industrial computer hardware and software tools, to integrate the technologically advanced and fully functional "Dynamic Communication" satellite communication vehicle.
2、Principle of Ease of Operation:The "Dynamic Communication" satellite communication vehicle should maintain uninterrupted information communication while in motion. It should be easy to operate, maintain, and use, with a system that is scientifically and reasonably configured. Practicality, reliability, safety, economy, and efficiency should be fully considered.
3、Principle of Standardization:System integration design should be standardized, with hardware, software, and protocols complying with relevant international and national standards, departmental standards, and applicable industry regulations. The satellite link utilizes communication satellites in the Ku band rented from the Ministry of Public Security.
Four,Overall Technical Specifications
11. Types of Services:Image, Voice, Data
22. Service Rate:2—4 MHz
33. Transmission Quality:Data Services: Channel Bit Error Rate Pe ≤ 1×10^-7
Image Services: Television Image Resolution: Above 550 lines
Voice Services: MOS > 4 levels
44. Operating Frequency Band:
Satellite Transponder: Ku Band
Other wireless devices: shortwave, microwave
51. Terminal Interface:
Data Interface: RS-232
Network Interface: RJ45
Telephone interface: RJ11
6Delay:
The total latency (the sum of end-to-end transmission latency and signal processing latency) is better than:
Image: < 3 seconds
Voice: < 1 second
Data: < 2 seconds
71. Access Methods:
Satellite Communication: Provides image, voice, and data transmission
Satellite TV Reception: Domestic reception
Microwave Audio and Video: China standard digital audio and video transmission standard.
82. Activation Time:
System initialization to activation time is less than 5 minutes
Communication device startup time < 2 minutes
Initial satellite acquisition time: Static ≤ 2 min
Dynamic ≤ 3 min
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91. Interconnectivity Requirements:
Direct access to public security data, images, and voice private networks via satellite links is required. The mobile communication vehicle should provide audio and video interfaces.
102. Electromagnetic Compatibility:
The equipment and subsystems should not be affected by the electromagnetic environment of the natural surroundings and nearby devices. Electromagnetic interference generated by the equipment itself should not affect other devices, and the equipment and subsystems should operate normally in the designated electromagnetic environment. Proper configuration of AC ground, DC ground, safety ground, lightning protection ground, and the overall grounding of the vehicle is essential. Equipment grounding, bonding, and shielding must comply with national regulations. The selection and wiring of wires and cables should meet the electromagnetic compatibility specifications for communication vehicles. Electromagnetic emission interference and the electromagnetic sensitivity of onboard equipment, components, and wiring should comply with relevant national or military standards; the electromagnetic shielding performance of the vehicle compartment should meet a level of 40dB.
113. Environmental Adaptability:
Temperature Requirements
Operating Temperature: -40℃ to +45℃ (external environment temperature for emergency communication vehicles)
0℃ to +40℃ (onboard equipment)
Storage Temperature: -30℃ to +60℃ (onboard equipment)
Humidity Requirements: Relative Humidity: 95±3% (at 40℃)
121. Grounding and Lightning Protection:
The satellite communication vehicle should have good grounding and lightning protection measures.
The grounding resistance should be less than 2 ohms.
132. Power Supply:
Mains Power: AC 220V±15%, 50Hz±3Hz
Generator Output: AC 220V±15%, 50Hz±3Hz
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Chapter Two
1. Satellite Communication System
Function:
The system includes a "Mobile Satellite Communication" vehicle (Mobile Satellite Communication onboard station) for each division, which will not independently construct satellite ground stations (to be considered later). It will utilize our bureau's satellite ground station for real-time communication. With the seamless coverage provided by satellite communication, combined with the mobility and rapid deployment features of the Mobile Satellite Communication onboard station, the communication command vehicle can be activated and put into use at any time and in any location, meeting the needs for handling emergency incidents. This enables high-quality bidirectional video, voice, and data transmission between each division's "Mobile Satellite Communication" vehicle and our bureau.
The basic services of the system include: bidirectional video, voice, and data point-to-point transmission services between the ground main station and the Mobile Satellite Communication onboard station, which include:
* 2 channels of IP data; can connect to our bureau's switch and log into the public security private network;
* 1 channel of bidirectional MPEG2, MPEG4 real-time images (bit rate adjustable);
* 4 channels of voice (can connect to user terminals, fax machines, switches).
* The system operates in the KU satellite frequency band, with a transmission error rate not lower than 10E-7.
Equipment configuration and specific requirements:
1* RF equipment: Amplifier (Wavestream, USA)
* 80W intermediate frequency
* P1dB power: >49dBm
* Rated output power: 49dBm
* Receiving frequency: 12.25-12.75GHz;
* Emission Frequency: 14.0-14.5 GHz
* IF Input Level: -40 to -20 dBm
2、Satellite Modem (Service):MODEM CDM600L(Designated by the Ministry of Public Security)
* Supports multiple Forward Error Correction (FEC) options.
* In the intermediate frequency range of 52-88 MHz and 104-176 MHz
* At a rate of 128kbps-20Mbps
* Supports BPSK, QPSK, 8-PSK, and various modulation methods
* Input/Output Impedance: 50-75Ω
* Equipped with fault detection and alarm functions, consistent with the equipment used at our ground station.
* Data Interfaces: EIA-422/530, V.35 Synchronous EIA-232
3、Audio and video codec devices:Kestrel FTF1000V(Designated by the Ministry of Public Security)
* Standards: PAL, NTSC
* Horizontal resolution: 720, 704, 544, 480, and 352
* Vertical resolution: 576 or 288 available
* Subtitle and VBI support
* Audio sampling frequency: selectable at 32/44.1/48kHz
* Video Input: SDI, Composite Video
* Audio Input: Balanced Stereo
4、Reuse Device: WankangMUX-2200E(Designated by the Ministry of Public Security)
* Supports 4 RJ-11 wired telephone interfaces
* Supports 2 RJ-45 data interfaces
* Supports 1 V.35 video interface
5、Satellite Modem (Network Management):MODEM CDM570L(Designated by the Ministry of Public Security)
* Supports multiple Forward Error Correction (FEC) options
* Intermediate frequency range of 52-88 MHz and 104-176 MHz
* Data rates from 128 kbps to 20 Mbps
* Supports BPSK, QPSK, 8-PSK, and various modulation schemes
* Data interfaces: EIA-422/530, V.35 synchronous EIA-232
6, GPS positioning system (Shan Hai Jing Wei Yi)(Designated by the Ministry of Public Security)
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Two,“Dynamic Express”Sky Feed System
Function:
The low-height "Moving Communication" satellite communication antenna system consists of a moving communication antenna, a stabilization control and navigation system, an inertial navigation system, a servo control system, a closed-loop correction system, a monitoring computer, a turntable controller, and a beacon machine. The laser gyro inertial navigation system uses the measured direction of gravitational acceleration and the Earth's rotation, GPS measurements of the vehicle's latitude and longitude on the ground, the satellite's orbital longitude, and the antenna's zero-point position as the initial reference for star alignment. By calculating these factors, the antenna is directly rotated to point towards the satellite for alignment and tracking. The antenna's baseline correction is then completed using the satellite's beacon signal, enabling continuous communication with the satellite while the vehicle is in motion, allowing for real-time transmission of voice, images, and data.
The phased array "Moving Communication" satellite communication antenna system consists of a gyro-stabilized platform and employs two tracking methods: signal tracking and beacon tracking. It is composed of a phased array antenna surface, a tracking servo system, an RX receiving platform, a TX transmitting platform, and a phased array sub-unit group. The tracking servo system utilizes a stable laser gyro-stabilized platform for automatic alignment (pointing to the satellite) and orientation tracking. It fully adopts a combination of mechanical and electronic structures, with mechanical methods used for large-range pitch tracking and electronic scanning methods for fine-tuning in small ranges. The gyro-stabilized platform automatically aligns (points to the satellite) the tracking system.
Configuration of equipment and specific requirements:
The contractor for this system construction may choose low-profile, phased array antennas. The specific parameter specifications are as follows:
1、Low Height ProfileAntenna
* Antenna diameter: 0.6m;
* Antenna height: ≤0.5m
* Antenna Gain: Transmission ≥ 35.5 dB
* Standing Wave Ratio: ≤1.25; Polarization Method: Linear Polarization
* Working wind speed: 20m/s (steady state); 27m/s (gust)
* Initial star acquisition time: <2 minutes
* Star accuracy: 0.1°
* Tracking Range: Omnidirectional
* Pitch and yaw tracking range: 10° to 85°
* Polarization tracking range: -130 to 90°
* Tracking accuracy: ±0.2°
* Tracking angular velocity: Azimuth > 200°/s; Elevation > 60°/s; Polarization > 60°/s
* Tracking angular acceleration: > 1000°/s2
* Occlusion recovery time: System < 1s
* Continuous operating time: ≥ 24h (AC power supply)
* Vibration resistance: 3g (20~200Hz)
* Shock resistance: ≥ 10g (6 ~ 20ms)
* Equipment lifespan: ≥ 15 years (including storage period)
2、 Phased Array Antenna
* Gain: 35dBi reception
* Antenna G/T: 13dB/°K@30℃
* Side lobe level: <-14dB
* Polarization Isolation: >33.5dB
* Uplink EIRP: 52dBW
* Orthogonal linear polarization: >25dB
* Pitch angle range: Automatic adjustment, 0°-90°
* Azimuth range: Automatic adjustment, 360° continuous
* Azimuth tracking speed: 150°/second
* Polarization angle range: Automatic adjustment, -180° to +180°
* Initial satellite acquisition and locking time: <12 seconds
* Satellite reacquisition time: <1 second
* Azimuth tracking accuracy: 0.1° @ 60°/s, 360°/s2
* Pitch and yaw tracking accuracy: 0.9° @ 45°/s, 180°/s2
3"Dynamic Transmission" Sky Antenna System
* The antenna for satellite tracking should primarily be controlled by a laser inertial navigation system, with beacon correction serving as an auxiliary function.
* Strong anti-blocking capability, lasting over 15 minutes; the antenna does not need to reacquire satellites, and communication can be restored once the blockage is removed.
* The shape of the antenna cover can change to match the contour of the car roof, providing discretion.
* Capable of autonomous star tracking in complex environments, featuring a blind spot star tracking function.
3. Wireless Image Acquisition System
The wireless image acquisition system includes: a portable single-soldier transmission system, a wireless vehicle-mounted transmission system, and antenna feeder equipment. (It is required that the frequency of the wireless transmission equipment does not interfere electromagnetically or in frequency with other wireless devices used in the local area.)
Configuration of equipment and specific requirements: (Tested and certified by the Ministry of Public Security)
1、 Vehicle-mounted wireless image transmission system: (Compliant with high-definition technology standards)
Center frequency: 300-400MHz
Carrier bandwidth: 2MHz
Transmitting power: ≤10W
Modulation method: SC-FDE, QPSK
Image format: PAL
Image quality: D1, MPEG2
Transmission rate: 2.8Mbps
Power Supply: AC220V
Frequency adjustment: The center frequency is adjustable with a knob-type adjustment method.
The transmitter can directly interconnect with the wireless image transmission receiver equipment of the Corps Public Security Bureau, allowing for mutual support and backup in emergency situations.
2、 Individual Soldier Wireless Image Transmission System: (Compliant with HD technology standards)
Center frequency: 300-400MHz
Carrier bandwidth: 2MHz
Transmission Power: ≤2W
Modulation method: SC-FDE, QPSK
Image format: PAL
Image Quality: D1, MPEG2
Transmission speed: 2.8Mbps
Power Supply: Lithium Battery ≥ 1 hour
Frequency Adjustment: The center frequency is adjustable with a knob-type adjustment method.
Individual soldier design: Insertable battery design, capable of being powered by both batteries and external power sources.
The individual launcher must be able to directly interconnect with the wireless image transmission receiver equipment of the Corps Public Security Bureau, and in emergency situations, they should be able to support and back each other up.
31. Sky Feed:Compatible with wireless image transmission transmitters, individual soldier wireless image transmission transmitters, and wireless image transmission receivers.
4. Audio and Video Capture and Processing System
Function:
The audio and video acquisition and processing system includes an audio and video matrix, an audio and video distributor, wireless conference microphones, monitoring speakers, a digital hard disk recorder, a roof camera, a rear camera, and a monitoring display.
The satellite communication vehicle is at the scene of the incident, transmitting images from the built-in cameras and portable wireless cameras through audio and video matrix equipment to various devices, such as in-vehicle monitoring equipment, digital video recorders, and image encoding/decoding devices. The voice from the in-vehicle voice equipment and portable wireless devices is processed and transmitted to different devices using audio matrix and video/audio distributors, such as digital video recorders and image encoding/decoding devices.
Configuration equipment and specific requirements:
1Audio and video matrix technical parameters:
Input: 16 channels of image and voice
Output: 8 channels of image and voice
Bandwidth 100MHz (-3dB), full load
0 -10MHz: ≤+/- 0.1dB
0 -30MHz: ≤+/- 0.5dB
Cross-talk between multiple channels and one channel: -50dB @ 5 MHz, -45dB @ 10 MHz
Differential phase I/0S < 1.28 degrees, 3.58MHz
Differential phase error 0.1%, 3.58-4.43MHz
Differential gain error 0.1 degrees, 3.58-4.43MHz
Maximum transmission delay: 5nS (±1nS)
Switching speed: 200 ns (maximum time)
Signal Type: Composite Video Signal
3、 Digital Video Recorder:
Video compression standards: MPEG4, MPEG-2
Video Input: 8-channel Composite Video (PAL/NTSC)
Video Output: BNC Input (1.0VP-P, 75Ω)
Video Frame Rate: 1 channel PAL/NTSC, BNC output (1.0VP-P, 75Ω)
Composite video signal: PAL: 1-25 frames/second NTSC: 1-30 frames/second
Bitrate range: 32K-2M
Video display: Single screen / Four screens / Eight screens / Sixteen screens
Resolution: D1, Half D1, CIF, and other formats
Audio compression standards: G.72X, ADPCM
Bitrate range: 8K-384K
Backup interfaces: Ethernet port and USB 2.0 port
Hard Drive: >2T
Operating environment temperature: 0 to +45ºC
Storage temperature: -20 to +60ºC
31. Roof-mounted PTZ Camera
Imaging Equipment: 1/3 inch CCD
Signal standard: PAL
Synchronization System: Internal/AC Line Lock
Video signal: 1.0Vp-p, 75 ohms
Horizontal resolution: Color 480 TV lines / Black and white 570 TV lines
Lens Mount Type: CS
Minimum illumination: Color 0.8 Lx (F1.4, 50 IRE), Black and White (Day/Night mode): 0.07 Lx (F1.4, 50 IRE)
Automatic Gain Control: On/Off (optional)
Aperture Control Mode: On/Off (Selectable), 1/50-1/100,000s
Zoom: 10x
Backlight compensation: adjustable in multiple modes including Super Dynamic/SPOT/WEIGHT/OFF.
Signal-to-noise ratio: Greater than 50dB
Automatic Aperture Lens: DC/VIDEO Servo
Power requirements: Automatically selects AC 24V or DC 12V power from an AC input of 220V-240V.
Operating temperature: 0°C - +45°C
Storage temperature: -20°C to +60°C
White Balance: 3200K/5600K/Manual/Dual White Balance with multiple adjustable options.
Day/Night Mode: Enhances the camera's sensitivity in low-light conditions.
Weight: <3kg
4、 In-Car Camera:
Imaging Equipment: 1/3 inch CCD
Signal Format: PAL
Aperture Control Mode: On/Off (selectable), 1/50-1/100,000s
Operating Temperature: 0°C - +45°C
Storage Temperature: -20°C - +60°C
4Rear Camera:
Imaging Equipment: 1/3 inch CCD
Signal Format: PAL
Aperture Control Mode: On/Off (selectable), 1/50-1/100,000s
Zoom: 6x
Operating temperature: 0°C - +45°C
Storage temperature: -20°C to +60°C
51. Monitor (4-channel 5-inch color display, two headrest monitors, in-car GPS navigation display.
TV Standards: PAL / NTSC (Automatic Recognition)
Display Size: 5 inches
Display Aspect Ratio: 4:3
Like: 1024x768
61. Video and Audio Splitter:
Select configuration based on requirements.
71. Monitor Speakers
Compact size, can be installed on the vehicle's rack.
81. Wireless Microphone
High sensitivity, the receiver operates on U-band frequencies, with strong resistance to electromagnetic interference.
91. In-car Navigation
Equipped with audio and video input/output, as well as vehicle navigation and positioning functions.
V. Computer and Network Systems
Function:The software of different devices on the "Dongzhongtong" satellite communication vehicle needs to be controlled via a computer. The various devices inside the vehicle are connected through a network, making operation easier through computer control.
Configuration of equipment and specific requirements:
11. Network Switch:
Fixed Ports: 24 x 10/100M Ethernet ports, 1 Console port
Input Voltage AC: 90V～264V 50/60Hz, DC: -75V～-36V
Operating Environment Temperature: 0～45℃
Operating Environment Humidity: 10%～90%
Line-speed Layer 2 Switching: Ports support line-speed forwarding, forwarding rate > 6.55Mpps
Switching Mode: Store and Forward
22. Laptop
CPU Type: Intel Core Dual-Core
CPU Clock Speed: Above 1.8G
Memory Capacity: 2G or more
Maximum memory capacity: 2048MB or more
Hard Drive Capacity: 60GB and above
Cache capacity: 2048KB or more
Video memory capacity: 512M or more
Wireless Standards 802.11a/b/g Wi-Fi Wireless MODEM 56K V.92
Standard Interfaces: Digital multimedia card reader slot, IEEE 1394 port, S-video port, VGA port, notebook expansion port, headphone/line output, microphone input, AC power connector, RJ-11 port, RJ-45 port, infrared port, USB 2.0 port, Type I/II PC card slot, ExpressCard/54 slot, Bluetooth, PCMCIA
6. Power System
Function:
The power system on the satellite communication vehicle provides power output for various devices, including mains electricity and generators. It features priority for mains electricity, multiple power sources, and automatic seamless switching.
Configuration of equipment and specific requirements:
1、 Generator
*Equipped with high-quality, compact, lightweight, and highly reliable starting and operating capabilities, the onboard generator is easy to operate and simple to maintain.
*Equipped with a 5KVA power take-off generator. (Customized based on the total power consumption of the integrated system equipment by the contractor.)
*The generator should be well-shielded against electromagnetic interference to reduce electromagnetic disturbance to other equipment.
*The power output of the generator is in accordance with the power ratio standards relative to the power consumption of the onboard satellite communication equipment.
*To save space, the generator is not equipped with a power enhancement module.
2、UPSPower Supply
*Equipped with an online isolation transformer 3KVA UPS uninterruptible power supply, providing at least 20 minutes of power for key equipment such as satellites, communications, and computers, with a bypass switch.
*The UPS is matched with the generator's power.
*There should be a countdown prompt after the UPS starts.
*Utilizes internationally high-quality, well-known brand products, with good technical support and service available domestically.
3*Distribution Cabinet
*The distribution cabinet is equipped with monitoring devices for both input and output, such as voltmeters, ammeters, and indicator lights, allowing for real-time understanding of the distribution system's operational status, preventing damage from current and voltage fluctuations.
*Power supply is separated into AC, DC, and UPS power supply, with devices requiring UPS power routed through the UPS to the branch switches on the distribution panel, while non-UPS powered devices are supplied directly through the branch switches of the distribution panel.
*The surface of the distribution panel is treated with spray plastic, and the distribution cabinet features automatic switching between power sources, leakage protection, over-voltage protection, and other measures. It is equipped with protective switches, transfer switches, control switches, etc., with clear Chinese labels on each operational switch for easy understanding and operation.
4*Wiring System
*The internal wiring uses a combination of exposed and concealed installation methods, with strong electricity, weak electricity, and signal lines separated to avoid interference and enhance safety performance.
* The system cables should be labeled at the junctions and cable sections for easier management during future after-sales maintenance.
VII. Vehicle Modification
Overall Modification Requirements:
The system provider is required to carry out modifications at a qualified vehicle modification factory, using advanced and mature solutions and technologies, as well as high-quality, highly reliable materials and auxiliary support equipment. A technologically advanced, reliable "Mobile Communication" satellite communication vehicle should be integrated. The satellite antenna for the "Mobile Communication" satellite communication vehicle should be installed on the roof without causing any damage. If the weight of the antenna exceeds the roof's load capacity, reinforcement must be applied to the roof's load-bearing points, and the power amplifier should also be installed on the roof.
The vehicle modification must comply with relevant domestic standards and the technical specifications set by the Ministry of Public Security. Modifications should be implemented to ensure reasonable weight distribution, shock resistance, dustproofing, noise reduction, and temperature control while maintaining the original performance of the vehicle. The design in terms of system performance, vehicle performance, structure, layout, vibration resistance, three-proofing, and safety must be professional and holistic, in accordance with national or military standards and the relevant regulations of the Ministry of Public Security.
11. Vehicle Selection for Modification
* The system construction will uniformly select the domestically produced Changfeng Mitsubishi Pajero V73 3.0 GL MT.
* Plastic engineering materials should be used for the cabinet, which is required to be installed at the rear of the vehicle.
* Equipment installation should be reasonable, with 4U reserved for the installation of wireless broadcasting network equipment.
* The design of audio and video output, external input interfaces, telephone and network external interfaces, AC power output interfaces, and mains input interfaces should be reasonable.
* Cabinet installation equipment requires vibration reduction measures.
* A complete toolbox
* Audio, video, network cable, telephone line cable reel 30 meters.
2. Safety Warning System
* Install the alarm warning light
* The warning light selection requires a concealed small warning light, to be installed at the front, side, and rear positions of the vehicle.
* Install the reversing radar and visual reversing probe at the rear of the vehicle, connecting it to the onboard navigation system.
Chapter Three
1. Business Requirements
1. Qualified Bidders
1. Must be an independent legal entity.
2. Must have relevant qualifications for satellite communication equipment integration.
3. Satellite antenna network products must have the network testing license issued by relevant national authorities.
4. Must have undertaken similar integration projects for provincial public security agencies, possess a strong technical service team, and have a good reputation for customer service.
(B) Bidder Qualification Certificates and Relevant Business Documents
1. Power of attorney from the legal representative.
2. Copies of the business license, tax registration certificate, and organization code certificate (stamped with the official seal).
3. Copies of various satellite communication equipment network testing reports and approval certificates (stamped with the official seal).
4. Main equipment must have a manufacturer's authorization letter or distribution agency certificate, and a commitment regarding the warranty period and service life of key satellite equipment such as inertial navigation systems and amplifiers.
5. Must ensure the legal source of imported products. If awarded the contract, customs import proof, product quality certificates, and inspection certificates must be provided at the time of goods acceptance.
6. After-sales service commitment letter (including warranty period, on-site service, repair response time, etc.).
7. Training plan (providing detailed training content, number of trainees, training duration, and training cost explanation).
8. Other documents that the supplier deems necessary to provide.
(III) After-sales service requirements
1. To ensure the normal operation of the project, after the system is established, the winning bidder is responsible for providing corresponding technical training. Training will be centralized for 4 personnel from the Public Security Bureau of the Corps; on-site training for 1-2 personnel, enabling them to independently operate the system and perform general maintenance.
2. The winning bidder shall provide a contact phone number and contact person, and must have sufficient technical strength and provide adequate spare parts for key system equipment, such as (inertial navigation, amplifiers).
3. Quality assurance period: The hardware products involved in this system construction shall have a free maintenance period of two years, calculated from the date of system acceptance. The integrator shall provide timely, rapid, and high-quality service, resolving system faults within 24 hours. After the warranty period, the integrator will maintain the system for free, charging only for cost after repairs, with repair time and service methods the same as during the warranty period (specific after-sales maintenance items will be negotiated during the bidding).
II.Technical evaluation method
For this bidding process, the company will bring a satellite vehicle to Urumqi, Xinjiang, and will conduct on-site testing with experts scoring on-site, without committing to winning the bid at the lowest price.
Test Location: Within Xinjiang (Urumqi, Yili, Kashgar, Korla, Aksu),
Test contentDuring the testing period, the Public Security Bureau of the Corps provided satellite ground stations and launch frequencies. During the testing period, the onboard amplifiers uniformly used saturated transmission power.
1. Static Star Tracking:
When the vehicle is stationary, start the satellite communication device and conduct satellite signal (AsiaSat 3, AsiaSat 4, AsiaSat 5, XinHua) testing in the stationary environment of the vehicle.
2. Dynamic Star Tracking:
While the vehicle is in motion, activate the satellite communication equipment to conduct satellite signal (A3, A4, A5, Xinnuo) testing in the vehicle's moving state.
3. Blind Spot Detection Function:
The vehicle loses power in the blind spot for 15 minutes, activates the satellite communication equipment, and performs satellite signal alignment while the vehicle is stationary. Then, the vehicle exits the blind spot to conduct automatic precise alignment.
4. Vehicle-mounted antenna obstruction recovery test:
After the satellite equipment is functioning normally, the vehicle enters a blind spot, such as parking inside a tunnel for 15 minutes and then turning around to exit the blind spot. This tests whether the satellite signal quickly recovers or loses lock.
5. Vehicle Bump Test:
The vehicle is driving on a bumpy road at a speed greater than 40 km/h, testing whether the satellite gyro stabilization system loses lock on the satellite signal and whether the image is intermittent or smooth.
6. High-speed driving test of the vehicle:
When the vehicle is traveling at high speeds exceeding 140 km/h, test the satellite communication system to see if it loses lock on the satellite signal, and whether the image is intermittent or smooth.
7. Vehicle Figure Eight Driving Test:
When the vehicle speed exceeds 40 mph, conduct a figure-eight maneuver test to check whether the onboard satellite antenna tracks the signal normally and whether the image is smooth.
8. Vehicle special weather testing: sandstorms, rain, and snow (to be determined based on weather conditions)
Test whether the received transmission level of the satellite communication system exceeds the minimum threshold value.
9. Vehicle-mounted antenna reception strength test:
Testing the quality of the vehicle-mounted satellite communication system.
10. Ground station reception strength test:
Testing the quality of the vehicle-mounted satellite communication system.