V6.06 key release information

New ICD documents supported in V6.06 software release:

IS-GPS-200K May 2019 version
IS-GPS-705F May 2019 version
IS-GPS-800F May 2019 version
RTCM Standard 10403.2

New features:

Support for Earth Orientation Parameters from ITRF 2014

The ITRF2014 solution replaces the ITRF2008 solution that was published by the IERS on 31 May 2010. ITRF2014 consists of sets of station positions and velocities with their variance/covariance matrices. It has been computed using solutions from four difference space geodetic techniques: VLBI (Very Long Baseline Interferometry), SLR (Satellite Laser Ranging), DORIS (Doppler Orbitography and Radiopositioning Integrated by Satellite), and GPS (Global Positioning System).

Synchronization between scenario and host PC

SimGEN now allows time synchronization between scenarios and real-world (host PC), for some specific timing tests. For example, simulators are used to change GPS locations to move telecom devices into different infrastructures (i.e. LTE cores from different vendors). It can be beneficial to simulate with current time/PC time so that data collected from modem logs are easier to analyse and compare. In the 'start time and duration' window, simply tick the 'Use Host(PC) time” box, and the start time of the scenario will be synchronised with current PC time.

SimAUTO now compatible with Windows 10

Microsoft is withdrawing support for Windows 7 on January 2020. Consequently, Spirent is rolling out Win7 compatible software updates.

SimAUTO, which enables Spirent GNSS simulators to provide lab test support for Multi-sensor In-Vehicle Navigation Systems (IVNS), is now compatible with Win10.

For more details on SimAUTO, please refer to the SimAUTO product brochure.

SimREPLAY+ now supports “Rectangular Racetrack” Simple Motion model

Scenarios containing “Rectangular Racetrack” motion can be loaded, and the parameters edited. These can be accessed from the Scenario Tree, by selecting the “Simple Motion” vehicle type and enabling “Rectangular Racetrack”.

The following parameters can be configured using the interface below:

  • Racetrack dimensions and orientation
  • Vehicle reference position, including height and direction
  • Vehicle dynamics; acceleration and speed

SimREPLAY+ now supports BeiDou “Extended constellation”

BeiDou scenarios containing “Extended constellation” can now be loaded, and the parameters edited. In the Scenario Tree, first enable a BeiDou signal. Then open the BeiDou Signal Sources files and select “Extended constellation” from the “General” tab.

By default “Off” state, PosApp uses SVIDs 1 to 30. Once “Extended constellation” is selected, PosApp can access SVIDs 1 to 30 and 31 to 63. The table below lists the satellite types and signals permitted for satellites in the constellation. Enabling “Extended constellation” also sets the AmEpID, AmID and BdEpID indicators in the Phase 3 D1 and D2 navigation messages - regardless of whether any extended constellation satellites are enabled in the scenario.

SimREPLAY+ now supports "SIG_TXID” and “SIG_ALL” remote commands

"SIG_TXID” and “SIG_ALL” are Signal Data Request remote commands, sent using the Socket String Send utility. They return information about the transmitting satellite:

SIG_TXID returns the SVID of the signal’s transmitter. The command is in the format:

< time_of_app >,SIG_TXID,[ < veh_ant > ],[ < freq > ],[ < id > ],[ < mode > ]

In the example -,SIG_TXID,v1_a1,GPS_L1,0 channel 1, vehicle 1, antenna 1, on GPS L1 has been assigned SVID 2. Channel 2 assigned SVID 5 and channel 3 is unallocated at the present time into run, as indicated by -1 . See screenshot below.

SIG_ALL returns an array of information regarding the addressed transmitting satellite:

  • Channel ID
  • Transmitter network type
  • Multipath index
  • Elevation (rad), azimuth (rad)
  • X (m), y (m), z (m)
  • Tropo delay (m), iono delay (m)
  • Pseudorange (m), pseudorange rate (m/s), range(m)
  • Signal level (db)
  • Pseudorange error (m)
  • Range rate (m/s)
  • Pseudorange error rate (m/s)
  • Doppler shift (hz)
  • Delta range (m/s)

The command is in the format:

< timestamp >,< command >,< veh_ant >,< freq >,< id >,< mode >, < multi_index >

In the example -,SIG_ALL,v1_a1,GPS_L1,1 all signal data for vehicle 1, antenna 1, on GPS L1 is returned in a single thread. See screenshot below.

For more new features and bug fixes, please see the full release notes

Full Release Notes