PDS_VERSION_ID   = PDS3
RECORD_TYPE      = STREAM
RELEASE_ID       = 0001
REVISION_ID      = 0000

OBJECT           = TEXT
PUBLICATION_DATE = 2013-05-24
NOTE             = "This file provides an overview of the GEOMETRY files 
                   format."
END_OBJECT       = TEXT
END



The GEOMETRY directory contains the geometry file for PFS observation.
A geometry file contains, for each measurement, the following information:

- Acquisition number
- Observation number
- Value of the Spacecraft clock
- Mars Longitude  for the LWC instrument    (-180°;+180°)             deg
- Mars Latitude   for the LWC instrument    (-90°;+90°)               deg
- Mars Longitude  for the SWC instrument    (-180°;+180°)             deg
- Mars Latitude   for the SWC instrument    (-90°;+90°)               deg
  The Longitudes are expressed following the Eastward convention
- Spacecraft altitude                                                 km     
- Local Time  at the SWC target                                       hours
- Solar Longitude                           (0°;+360°)                deg
- Incidence angle for the SWC instrument    (0°;+180°)                deg
- Emission angle  for the SWC instrument    (0°;+180°)                deg
- Phase angle     for the SWC instrument    (0°;+180°)                deg
- Mola Altimetry                                                      m
- Limb altitude   for the SWC instrument                              km
- This parameter is non-zero only for limb observations                
- Distance from the spacecraft to the target point (SWC)              km
- Solar distance                                                      AU
- Longitude of the sub-solar point          (-180°;+180°)             deg
- Latitude  of the sub-solar point          (-90°;+90°)               deg
- Planetary phase angle                     (0°;+180°)                deg
- Longitude of the sub-spacecraft point     (-180°;+180°)             deg
- Latitude of  the sub-spacecraft point     (-90°;+90°)               deg
- Julian Date
- Secant of the emission angle

The sub-directory structure is the same as the DATA directory, i.e. separated
for LW and SW sensor and splitted in groups of 10 orbits. GEOMETRY data only 
during science data acquisition.
GEOMETRY directory structure:

GEOMETRY directory structure outline:

GEOMETRY
 |
 | -LWC
 |  |- ORB001X
 |  |- ORB002X
 |
 |- SWC
    | - ORB001X
    | - ORB002X


GEOMETRY files naming convention:

PFS_<orbit>_MEAS_GEO_<detector>.DAT

<orbit>    Orbit number.

<detector>  defines the type of the detector used for the interferogram
            acquisition: Short wavelength (SW) or Long wavelength (LW).

<ext>       extension depends on the type of file (LBL for a label file,
            DAT for the data product associated with the label).

E.G. :
PFS_0030_MEAS_GEO_LW.DAT
PFS_0030_MEAS_GEO_LW.LBL


The .DAT product and .LBL label above are product associated to data file
acquired during science data acquisition in the orbit 30, namely the files

PFS_0030_MEAS_HK_LW.DAT   housekeeping information collected during science
                          data acquisition in orbit 30
PFS_0030_MEAS_RAW_LW.DAT  RAW data collected during science data acquisition
                          in orbit 30