Constellation Simulation _ Constellation Simulation and Verification System

Simulation evaluation of GPS signal simulator

* constellation simulation:

Satellite orbit simulation, satellite clock error simulation, delay difference TGD simulation, ionospheric delay simulation, tropospheric delay simulation, earth rotation effect simulation, relativistic effect simulation, ground atmospheric parameters simulation and user trajectory simulation.

* Test evaluation:

It can complete ranging accuracy test, navigation message test, out-of-lock recapture test, positioning accuracy test, speed measurement accuracy test, channel delay test, consistency test, bit error rate test and so on.

leading indicators

* signal scale

Number of channels: 24 channels per frequency.

* Signal accuracy

Pseudo-range phase control accuracy: better than 0.05m.

Accuracy of pseudorange change rate: better than 0.005 m/s.

Consistency between channels: 0.3 nanosecond

Consistency between carrier and pseudo code;

I and q phase orthogonality:

Channel delay stability:

* Signal quality

Phase noise:-80 DBC/Hz100 Hz; -85db/Hz 1 kHz

-90 DBC/Hz 10 kHz； -95 dB/Hz 100 kHz

Harmonic power (maximum): -40dBc

Clutter power (maximum): -60dBc

* signal power

Power range: -60 DBM ~- 160 DBM

Power resolution: 0.2dB

Power accuracy: 0.7dB

* Frequency stability

Second stability: ≤ 1× 10

Weather stability: ≤ 2× 10

* second pulse output

Output level: 3.3v LVTTL

Rising edge stability: 0. 1ns

Duty cycle: 50%

* Reliability indicators

MTBF:& gt； 2000 hours

MTTR:& gt； 2 hours

MLDT:& lt； 24 hours

* External interface

Reference 1PPS input: 1.

Reference 1PPS output: 1.

Reference 10MHz input: 1.

Reference 10MHz output: 1.

Inertial navigation auxiliary data output: 1

* Power supply

100-240V AC10% (50/60Hz 1%)