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ADN

« Analyse de Données de Navigation » (ADN) is a software that provides display and analysis capacity of GNSS navigation data. ADN is developed as a standalone Windows application which allows displaying data computed by external GNSS receivers or through its internal algorithms.

ADN allows:

  • Real-time acquisition of GNSS data in SEPTENTRIO SBF, NOVATEL ASCII, EGNOS RIMS, JAVAD GREIS and NMEA 0183 formats through serial lines or LAN connections,
  • Real-time archiving and decommutation of the acquired data,
  • Real-time displaying of the receiver and computed data through numerous graphical formats,
  • Importation and replay of RINEX data,
  • Computation of position, speed and timing information from raw measurements and navigation data acquired by an external receiver or read from RINEX files,
  • Computation of performance figures of the different GNSS services: precision, protection levels, integrity alarms, service availability…
  • Compatible with all existing and future GPS, GLONASS, SBAS and GALILEO/GIOVE navigation signals (i.e. GPS L2C, GPS L5, SBAS L5…).
  • Real-time service volume computation,
  • Replay of the archived data with configurable speed including step by step,
  • Easy export of graphical outputs through print-outs or image data,
  • Running in slideshow mode for long term survey of a given GNSS service level,
  • Comparing analysis results by running different sessions at the same time.

ADN supports GPS, GLONASS, SBAS (WAAS, EGNOS and MSAS) and GALILEO/GIOVE constellations in mono-frequency with or without SBAS augmentation or in bi-frequency modes.

It embeds most of the algorithms described in the GPS SIS ICD, GLONASS SIS ICD, WAAS/EGNOS MOPS and GALILEO SIS ICD including the computation of mixed GPS/GLONASS/GALILEO navigation solutions.

Klobuchar, bi-frequency, SBAS and Galileo’s NeQuick ionosphere models are fully implemented and can be mixed across constellations.

Sample graphical output: constellation survey

ADN includes raw navigation data synchronisation and decommutation algorithms including GPS, GLONASS, SBAS, GALILEO and GIOVE allowing autonomous computation of mixed real-time GPS/GLONASS/SBAS/GIOVE navigation solutions.

Mixed GPS/GIOVE solution: GIOVE A&B residuals

Mixed GPS/GLONASS/GALILEO navigation solutions are based on broadcast GGTO or internally computed GGTO.

Mixed GPS/GIOVE solution: GGTO computed & broadcast

MOPS algorithms are fully implemented allowing the real-time monitoring of any SBAS augmented system. This includes computation algorithms for satellite corrections, ionosphere model, troposphere model and protection levels.

Mixed GPS/GLONASS/GALILEO navigation solutions are based on broadcast GGTO or internally computed GGTO.

SBAS PA service survey: vertical error + VPL

Stanford diagrams allow the analysis of SBAS service availability. Positioning errors are computed by comparing the computed position versus the reference position of the antenna. The diagrams are fully configurable in terms of scaling, thresholds and granularity.

SBAS PA service survey: Service availability/VPL

The application embeds advanced graphical objects for real-time survey at 1 Hz refresh rate. The data acquisition, decommutation and computation modules can accommodate with high frequency data sampling delivered by modern receivers (10-20 Hz typical).

Satellites in view with antenna mask builder

GPS signals reception level

ADN embeds a Service Volume computation module allowing the analysis of the performance over a service area.

EGNOS PA service analysis: HPL

Performance outputs concern satellite visibility, DOP, protection levels, ionosphere maps and service availability, integrity and continuity.

EGNOS ionosphere corrections: GIVE

EGNOS PA service levels availability

EGNOS LPV-200 service level continuity map

The high flexibility of the configuration for each algorithm allows easy comparison of the results obtained through different configurations.

Ionosphere delays at high and low elevation: Klobuchar

Ionosphere delays at high and low elevation: SBAS

Ionosphere delays at high and low elevation: NeQuick

ADN includes also an advanced map display tool based on Microsoft Virtual Earth technology. Coupled with Microsoft MSR map cruncher for the geo-referencing and tiling of aerial images, it provides accurate map positioning.

Map display: geo referenced and tiled aerial image

The map module is also compatible with Microsoft Bing Maps and Google maps tiles as it uses the same format and supports the both systems tile naming conventions.

Map display: Microsoft Bing Maps coupling

Map display: Google Maps coupling

The map module can also accommodate with rover receiver data.

Map display: Rover data

The application can export all computed parameters in CSV (Comma Separated Values) format for external post-processing.
It also supports inter-application copy/paste operations to quickly elaborate reports and documents.

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