Attachment 1 - GPS Simulator Specifications.pdf

GNSS Simulator Technical Specification

1. High-Level Scope: The U.S. Coast Guard Academy has a need for a Global Navigation Satellite System (GNSS) simulator to support the USCG mission and to support the education of the next generation of USCG Officers. The USCG requires the technology employ Software Defined Radio (SDR) methods to maximize the flexibility of simulation capability. The simulator must be capable of simulating modern jam and spoofing threats, and must be capable of live-sky synchronization.

2. Size, Weight, and Power (SWAP) Specifications

a. Size: Rack Mountable 8U or less:

I. Width: 19 inches II. Depth : 27 inches or less

III. Height: 14 inches or less

b. Weight: 115 pounds or less (including signal generator and any host computer)

c. Power: Powered by 110VAC outlet, maximum 20 Amps total (including power requirement for computer and signal generator)

3. SDR Cards:

a. Minimum number of SDR cards required: 2

b. Capable of expanding to support up to 640 total channels (to support all constellations and multipath simulations)

c. Number of channels per SDR card: minimum 64

d. Minimum number of RF outputs required: 2

4. Constellations

a. GPS: L1C/A (-130.0dBm nominal), L1P (-133.0dBm nominal), L1C (Pilot code)

(-128.25dBm nominal), L1C (Data code) (-133.0dBm nominal), L2P (-136.0dBm nominal), L2C (-136.0dBm nominal), L5 (-127.9dBm),

b. GPS Encrypted: L1P(Y) (-133.0dBm nominal), L2P(Y) (-136.0dBm nominal), L1-AES-M (-128.5dBm nominal), L2-AES-M (Threshold), L1-MNSA-M (Objective), L2-MNSA-M (Objective)

c. Galileo: E1 (-125.5dBm nominal), E1B-OSNMA (-128.0dBm nominal), E5a (-122dBm nominal), E5b (-122dBm nominal), E5-altBOC (-122dBm nominal), E6 (-125.5dBm nominal)

d. GLONASS: F1C/A (-131dBm nominal), F2C/A (-137dBm nominal), L1 (-128.5dBm nominal), L2 (-128.5dBm nominal), L3 (-128.5dBm nominal)

e. BeiDou: B1I (-133dBm nominal), B1C (-130dBm nominal), B2I (-133dBm nominal), B2A (-127dBm nominal), B2B (-130dBm nominal), B3I (-133dBm nominal)

f. QZSS: L1 C/A,C/B (-128.5dBm nominal), L1S (-131dBm nominal), L2C (-130dBm nominal), L5(I+Q) (-124.9dBm nominal) and L5(S) (-127dBm nominal), L6 (-126.82dBm nominal)

g. SBAS: L1 C/A (-130dBm nominal), L5 – WAAS, EGNOS, MSAS, GAGAN, SCM (-127.9dBm nominal)

h. LEO: Capacity to generate up to 50 satellites, allowing for user entry for atmospheric drag, surface area, and atmospheric drag.

5. RF Outputs:

a. Min: 2 RF outputs

b. Capability to expand to up to 4 RF outputs

6. System Performance

a. Simulation iteration rate:

I. Configurable iteration rates of 10/100/250/500/1000/2000 Hz

b. RF Signal Carrier Level Control:

I. -165dBm minimum to -122dBm maximum

c. Signal Accuracy:

I. Pseudorange Accuracy: 0.5 millimeters RMS II. Pseudorange Bias: 0 millimeters

d. Simulation Dynamics (Threshold) I. Max relative velocity: 100,000 meters/second

II. Max relative acceleration: 190,000 meters/second squared III. Max relative jerk: 800,000 meters/second cubed

e. LEO Model Number of Satellites:

I. Minimum 50 satellite capability

f. Embedded Multipath simulation:

I. Fixed path-length delay per path: 0 to 1200 meters

II. Fixed path-length resolution: 5 meters

g. Hardware-in-the-Loop (HIL) Latency:

I. 2 milliseconds maximum

h. Terrain Modeling 3D Maps, supporting DTED levels 0, 1 and 2

7. Software Features Required:

a. Leap-second and week-number-rollover event testing capability

b. DGPS corrections

c. Live sky-synchronization

d. Simulated LEO constellations

e. Independent satellite controls (e.g. signal level and timing)

f. Simulation of signal interference/impairments

g. Customizable models for vehicles

h. Post-Processing capabilities.

i. Capability for customizable scenario creation

j. Ability to configure simulator to simulate variable real-world sea states, vessel dynamics, and receiving antenna patterns

k. Simulation of signal interference/impairments: Ability to generate RF interference or noise for testing satellite navigation equipment. Specific interference sources should include CW, AM, and FM (both continuous and pulsed)- Ability to create scenarios where one or more satellite oscillators have been degraded (e.g. one or more satellite signals start a linear phase shift at a given time).