In addition to the Magnetometer/Electron Reflectometer (MAG/ER) datasets, this disk contains ancillary data files describing the spacecraft's trajectory and instrumentation. These include kernel files which can be used in the processing and interpretation of geometry data.
Geometry data reside in the GEOMETRY directory and its subdirectories. The principal files in the GEOMETRY directory are:
File |
Description |
An ASCII file with column headers, summarizing orbit information: |
|
A SPICE MAG/ER instrument kernel containing a MAG/ER |
|
A "planetary constants" kernel, used by NAIF subroutines which require |
|
A magnetometer constants file used for conversion of telemetry. |
|
A file which provides information about program variables used in |
|
A spacecraft clock kernel, needed to convert spacecraft ticks |
|
A leapseconds kernel file, also needed to convert spacecraft ticks |
|
A frames kernel file, containing frame definitions for |
|
A Spacecraft Magnetic Field Model File. |
|
An image file showing the ER instrument geometry. |
|
An image file showing the ER instrument geometry. |
Additional spacecraft ephemeris data are contained in the Magnetometer data.
The NAIF node of the Planetary Data System (PDS) maintains an archive of SPICE kernel files, which contain ancillary geometry data for planetary missions. NAIF also maintains software for the utilization of SPICE data. For further information on NAIF and SPICE data, consult the NAIF Website at http://pds.jpl.nasa.gov/naif.html.