WEBGEOCALC
The WebGeocalc tool (WGC) provides a web-based graphical user interface to many of the observation geometry computations available from the "SPICE" system. A WGC user can perform SPICE computations without the need to write a program; the user need have only a computer with a standard web browser. WGC is provided to the ESA SPICE Service by NAIF.
The WGC server is built upon the Toolkit code available from the NAIF server; it merely provides another kind of interface to that code.
WEBGEOCALC FOR ESA PLANETARY MISSIONS
The ESA Planetary Mission's WebGeoCalc instance is available here:
http://spice.esac.esa.int/webgeocalc
The instance currently contains operational and archived data as well as data for training purposes of for specific cross-mission scenarios. The data used is the latest available in the operational repository and from the latest archive increment published in the PSA. There are different data sets available for each missions which are briefly described in WebGeoCalc.
The data used for each mission can be found here:
| Mission | Status | Dataset | Link to data |
| ExoMars 2016 | Operational | Default | Metakernel |
| BepiColombo | Study | Default | Metakernel |
| JUICE | Study | CReMA 3.2 - Consolidated Study Trajectory 141a | Metakernel |
| JUICE | Study | CReMa 3.1 - SOC GCO500 and Europa Flyby-s Study | Metakernel |
| JUICE | Study | CReMA 3.1 - SOC Study for GCO500 and Europa Flyby | Metakernel |
| JUICE | Study | CReMA 3.1 - Consolidated Study Trajectory c141 n45 | Metakernel |
| JUICE | Study | CReMA 3.0 - Consolidated Study Trajectory 141a | Metakernel |
| JUICE | Study | CReMA 2.0 - Study Trajectory 140 | Metakernel |
| Mars Express | Archived | Default | Metakernel |
| Rosetta | Archived | Default | Metakernel |
| Venus Express | Archived | Default | Metakernel |
| Chandrayaan-1 | Legacy | Default | Metakernel |
IMPORTANT: Understanding the origin of the data being used is paramount for a correct usage of WebGeoCalc if you have any doubts about the data beyond what is described in the tool when selecting a given Data set please contact the ESA SPICE Service.
WHY USE WEBGEOCALC?
This WGC instance supports ESA planetary projects and planetary data research in several ways:
- It opens up much of the SPICE computational capability to those unable to write programs
- It offers a mechanism that scientists and engineers may use to help verify their own SPICE-based code
- It provides a quick and easy means for peer reviewers of science data archives to spot check many of the observation geometry computations included in the archive
- It opens the possibility to obtain a quick answer to a geometry question arising during a meeting
WGC makes the job of computing many kinds of observation geometry quicker and somewhat easier than if one has to write a program to do so. A modest amount of HELP information is provided within the tool. Nevertheless, the user must have some understanding of the concepts and terminology used in the field of planetary science, and in SPICE.
MORE INFORMATION
More information about WebGeoCalc can be found here.
A NAIF WebGeocalc Tutorial (PDF format) provides an introduction to this tool.
In addition NAIF provides a WebGeoCalc instance for PDS Archived data for the latest SPICE increments for Rosetta, Mars Express and Venus Express. This instance can be found here: