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GPSG-1000

VIAVI GPSG-1000 GPS/Galileo Portable Positional Satellite Simulator

Portable 12-channel GPS and Galileo positional simulator with WAAS/EGNOS SBAS simulation for testing GPS-enabled receivers.

Display: 12” color LCD, sunlight readable with back light
Controls: Touch screen

Datasheet

Overview

The VIAVI GPSG-1000 is a portable, configurable GPS and Galileo positional simulator. It is a 12-channel test set that creates three-dimensional simulations for testing GPS/Galileo receivers, including WAAS/EGNOS SBAS simulation, and is designed to be software upgradable.

System

The simulated 3D position can be entered by the user in latitude/longitude/height format, or simulated dynamically using a multi-leg waypoint entry scheme. An unlimited number of navigation plans can be saved and recalled under a user-assigned name. A built-in GPS receiver allows positional simulation in the form of a range, heading and altitude based on the current test set position.

Satellite Vehicle Selection and SBAS

All GPSG-1000 configurations allow GPS and Galileo satellites to be mixed, and the Galileo codes can be updated via a text file upload. SBAS satellites (WAAS/EGNOS) can be selected manually or automatically based on the simulated position.

Waypoints

Waypoint legs join in 3D space, with either range rate or altitude rate calculated automatically. Trajectory changes are calculated to simulate real-world navigation: heading changes between legs use realistic rates of turn, and altitude changes use realistic rates of climb or descent. Waypoints can be entered in latitude/longitude form or recalled from an airport or city database.

Setup

A setup page lets the user set system, user and RF connection parameters.

Key Features

GPS signals simulated: L1, L1C, L2C, L5 (some receivers require synchronized L1 transmissions to track L1C, L2C or L5)
Galileo signals simulated: E1, E5, E5a, E5b (some receivers require synchronized E1 transmissions to track E5 signals)
Simultaneous GPS/Galileo simulation
WAAS/EGNOS SBAS simulation
Static and dynamic simulations via NMEA-0183 file record and playback
12 channel configuration available with upgrade path (RAIM supported)
Programmable space vehicle (SV) parametrics and health
User or built-in GPS receiver referenced time and date
PVT data available via RS-232
User defined data transferable between linked GPSG units
Ethernet remote control interface
Galileo codes updatable via text file upload
Unlimited navigation plans saved and recalled by name
Waypoints recalled from an airport or city database

Specifications

User Interface

Display	12” color LCD, sunlight readable with back light
Controls	Touch screen

Antenna Coupler

Coupler Type	Cavity, patch
Coupling Loss	21.5 dB typical at 1575.42 MHz
Isolation	>25 dB at 1575.42 MHz The separate GPSG Antenna Coupler data sheet states >20 dB isolation
Dimensions	7.54 x 7.46 x 7.46 in (19.15 x 18.95 x 18.95 cm) Maximum antenna height accommodated 1.5 in
RF Gasket	Flexible seal
Connector	TNC
Positioning	By hand or with optional 8 ft placement pole via hook.
Placement Security	Weighted peripheral bag
Multiple GPS Antenna Support	Supports two to three GPS antennas using optional antenna coupler kits.

Direct Connection Ports

Impedance	50 Ω
SWR	1.3:1 maximum
Connector	TNC x 2
Coupling	AC (maximum DC input 50 V)

GPS Frequencies

L1	1575.42 MHz (C/A, pseuo P(Y), SBAS)
L1C	1575.42 MHz
L2	1227.60 MHz (pseudo P(Y))
L2C	1227.60 MHz
L5	1176.45 MHz (New Civil SoL)

Galileo Frequencies

E1	1575.42 MHz (pseudo-PRS, [pseudo-G/NAV]), (OS, CS, SoL, [I/ NAV])
E5	1191.795 MHz center frequency
E5a	1176.45 MHz (OS, (F/NAV))
E5b	1207.14 MHz (CS, SoL, (I/NAV))

Generator

Accuracy	Same as master oscillator
Inter Channel Bias	Zero (digital design)
Frame Sync Output	LVTTL
Channels	1-12 SV simulation, selectable
GPS PRN	1 to 32
Galileo PRN	1 to 36
SBAS PRN	120 to 138
Static Positional Simulation	Via user entry of Latitude/Longitude/Altitude or selectable from waypoint database
Dynamic Positional Simulation	Create, store, and recall routes consisting of multiple route points.
Trajectory Simulation	Record and playback GPS receiver data.
Almanac	Obtainable from built-in GPS receiver or external file load in .alm format
NAV Data	Navigation data is computed in real-time to match the simulation.

User Defined Errors

Doppler Error (selectable frequency offset)	±5.0 kHz, 1 Hz increment
Amplitude Offset	±15 dB in 1 dB increments Sets SV carrier amplitude offset from main attenuator setting
Step Error	±10 km in 1 m increments Sets SV pseudo range error; used for RAIM testing
Satellite Health	Allows selection of GOOD or BAD
Code Carrier Coherence Range	2 m/S Sets frequency variation between code carriers
Code Carrier Coherence Increment	1 mm/S

GPS Codes

L1 C/A Code Rate	1.023 Mc/s Primary sequence length 1023 bits; BPSK; 50 sps
SBAS	WAAS/EGNOS L1, L5
L2C Code Rate	0.5115 Mc/s Sequence length 10230/767250 bits; BPSK; 50 sps
L1 P(Y) (not encrypted)	Long random codes simulated Code rate 10.230 Mc/s; sequence length 15345000 bits; BPSK
L1C Code Rate	10.230 Mc/s Sequence length 10230 bits; BOC (1, 1)
L5 Code Rate	10.230 Mc/s Sequence length 10230 bits; QPSK

Galileo Services

E1 PRS	not supported
Pseudo G/NAV	Long random codes simulated Code rate 2.5575 Mc/s; sequence length 25575 bits; 100 sps; Interplex/CBOC; sub-modulation BOC (15, 2.5)
E1 OS	Complete implementation (I/NAV)
E1 CS	Null message content (pseudo I/NAV)
E1 SoL	Compliant, no integrity alerts (I/NAV)
E1 Code Rate	1.023 Mc/s Sequence length 4092 (primary) x 1 (secondary) bits; 250 sps; Interplex/CBOC; sub-modulation CBOC(6,1,1)
E5a OS	Complete implementation (F/NAV)
E5a Code Rate	10.23 Mc/s Sequence length 10230 (primary) x 20 (secondary) bits; 50 sps; ALTBOC
E5b OS	Complete implementation (F/NAV)
E5b CS	Null message content (pseudo I/NAV)
E5b SoL	Compliant, no integrity alerts (I/NAV)
E5b Code Rate	10.23 Mc/s Sequence length 10230 (primary) x 4 (secondary) bits; 250 sps; ALTBOC

Positional Simulation

Max Relative Velocity	±1000 Kts (514 m/s)
Max Relative Acceleration	±98 m/s2
Max Relative Jerk	±20 m/s3
Max Altitude	100,000 ft.
Error Models	Atmospheric
Pseudorange Accuracy	<0.1 m
Pseudorange Rate Accuracy	±0.01 m/s (RMS) With respect to master oscillator

RF Output and Signal Quality

RF Output Level, Direct	-93 to -155 in 1 dB step
RF Output Level, ANT Coupler	-68 to -130 in 1 dB step
RF Output Accuracy	±2 dB accuracy into 50 Ω (AC coupled) Standard cable, 4 dB loss
Spurious	<-35 dBc over the bandwidth (40 MHz)
Harmonics	<-45 dBc

Master Oscillator

Frequency	10 MHz nominal
Temperature Stability	±0.05 ppm
Aging Rate	±0.3 ppm /yr., ±2.5 ppm /10 yr.
Uncertainty	±1 ppm
External Reference Input Level	0.25 to 6.0 Vp-p
External Reference Input Impedance	50 ohm nominal
External Reference Input Frequency	10.0 MHz ±10 Hz
External Reference Output Level	1.5 Vp-p nominal into 50 Ω
External Reference Output Frequency	10.0 MHz nominal

Interfaces

PVT Data	RS-232
Remote Control Interface	Ethernet

Power

Battery	14.4V 6.75 Ah Lithium Ion
Battery Temperature Range for Charging	0° to 45°C (32° to 113°F)
DC Input	11-32 VDC 75 W max. 5 A max.

Environmental

Operational Temperature	-20° to 55° C (-4° to 131°F) Test set
Storage Temperature	-30° to 71° C (-22° to 159.8°F) Test set
Operational Humidity	MIL-PRF-28800F Class 2
Storage Humidity	MIL-PRF-28800F Class 2
Altitude	10,000 feet
AC to DC Converter Use	Indoors Supplied external AC to DC converter
AC to DC Converter Operating Temperature	5°C to 40°C (41° to 104°F)
AC to DC Converter Storage Temperature	-20°C to 71°C (-4° to 159.8°F)

Physical

Dimensions (H x W x D)	11.22 x 15.15 x 3.54 in (28.5 x 38.5 x 9 cm) Web page lists 10.6”H x 13.9”W x 3.4”D (27.0 cm x 35.5 cm x 8.7 cm); data sheet value used
Dimensions (Shipping Case)	20.8 x 31.5 x 13 in (53 x 80 x 33 cm)
Weight, Test Set	15.5 lb (7 kg) Test set only
Weight, Kit	52 lb (23.5 kg) Kit with shipping case

Certifications

Vibration, Shock, Transit Drop, Drip Proof, Dust, Explosive Atmosphere	MIL-PRF-28800F Class 2 Test set
Safety Compliance	UL-61010-1, EN-61010-1, WEEE, ROHS Test set
EMC Emissions	MIL-PRF-28800F Class 2, EN 61326-1 Class A, EN 61000-3-2, EN 61000-3-3
EMC Immunity	MIL-PRF-28800F Class 2, EN 61326-1 Class A
AC-DC Converter Safety Compliance	UL 1950 DS, CSA 22.2 No. 234, VDE EN 60 950
AC-DC Converter EMI/RFI Compliance	FCC Docket 20780 Curve “B”
AC-DC Converter EMC	EN 61326
Transit Case Drop Test	FED-STD-101C, Method 5007.1 Paragraph 6.3, Procedure A, Level A
Transit Case Falling Dart Impact	ATA 300 Category I
Transit Case Vibration, Loose Cargo	FED-STD-101C Method 5019
Transit Case Vibration, Sweep	ATA 300 Category I
Transit Case Simulated Rainfall	MIL-STD-810F Method 506.4 Procedure II of 4.1.2; FED-STD-101C Method 5009.1 Sec 6.7.1
Transit Case Immersion	MIL-STD-810F Method 512.4

Specifications are taken from the manufacturer's documentation. See the datasheet for complete and current values.

Applications

General testing of civil GPS and Galileo receivers
Testing of non-encrypted military GPS receivers
Positive Train Control
Asset tracking and telematics
TAWS / WAAS / GBAS

Included

Supplied external AC to DC converter
Shipping case

Options & Accessories

Option	Description
87636	GPS Antenna coupler — Provides >20 dB isolation and shielding from outside GPS signals; L1/L2/L5; TNC female; fits GPS antennas smaller than 6.5” x 6.5” x 1.5”
90106	Kit, Antenna Coupler Pole, 8 ft. w/ D Ring
88753	Weighted Bag
112830	Cable Coax, TNC-TNC 6’
114131	Cable Coax, TNC-TNC 25’