MGS TES Time Sequential Data Product (TSDR)

TSDR – Time Sequential Data Record

Instrument: Thermal Emission Spectrometer

PDS Data Set ID: MGS-M-TES-3-TSDR-V2.0DOI: 10.17189/1519551Citations of DOI: 10.17189/1519551

For more information about TES TSDR products, see the Data Set Catalog File, the TSDR Product SIS, or the TSDR Archive SIS.

The Thermal Emission Spectrometer (TES) Time Sequential Data Record (TSDR) data products contain the raw and calibrated thermal IR radiance spectra, the visual and thermal bolometric radiance measurements, and several atmospheric and surface properties derived from this data. Also included are the parameters that describe each observation, some downlinked diagnostic information, and the pointing and positional information derived from the project’s SPICE kernels.

The TES data is divided into 10 tables. The first three digits of [xxxxx] are equivalent to the final three digits of the volume ID; the final two digits are a sequential product number.

Table

Contents

ATM

Values derived from spectra that include Mars in the field of view.  It contains one record for each valid calibrated radiance which includes the planet and for which any valid quantities could be derived.

BOL

Raw and calibrated visual and thermal bolometer measurements, and several properties derived from these measurements.  Six BOL table records are generated for each instrument scan; one for each detector.  When spectrometer data are temporally averaged, there can be up to 4 scans of bolometer data

CMP

Real and complex data from the FFT.  The complex data is only down-linked when requested, and can only be requested for a single detector per observation.  The CMP array contains 286 points (143 real, 143 complex) for a short scan, and 572 points (286 real, 286 complex) for a long scan.

GEO

Information about the sun/spacecraft/planet geometry in a format that is easily searchable.  These values are computed for every scan other than those that could not have targeted the planet (i.e., not for reference looks).  If the observation failed to hit the planet, some values can still be computed, and others are set to impossible fill values.

IFG

Raw interferogram data.  The interferogram data is only down-linked when requested, and can only be requested for a single detector per observation.  The IFG array contains 1600 points for a short scan, and 3200 points for a long scan.  The interferogram data array is stored in a variable length record.

LMB

Values derived from spectra that look at the limb of Mars.  It contains one record for each limb set (sequential observations that view the limb at different altitudes).  The aerosol information may include data from surface observations taken of the same geographic region at other times.

OBS

State of the instrument at the start of each observation.  One OBS record is generated for each observation.

POS

Positions of the spacecraft and sun relative to the planet, the spacecraft’s orientation quaternion, and the Mars body quaternion, all relative to the J2000 system.  This data is initially derived from the project SPICE kernels, but may be corrected from other sources.  This table may also include interpolated values where SPICE data was unavailable.

RAD

Raw and calibrated observed radiances.  For each observation there can be up to 6 RAD records, one for each active spectrometer detector.

TLM

Auxiliary observation parameters.  Records in the TLM table occur at a frequency less than or equal to the frequency of OBS records; that is, one (or none) per observation.

TES TSDR data tables have the following file names:

tttmmmnn.TAB

where:

ttt = table type from above

mmm = final three digits of the volume ID

nn = 2-digit sequential product number

In ODE, TSDR products, which include the files in the above table and the table below, have the following Product IDs:

TSDR1MMM

Each TSDR product also contains each of the four following documents:

File Name

Contents

ENB.TXT

TES team experimenter’s notebook

STDSHAPE.TAB

Table of values of aerosol spectral shapes used to fit the array of retrieved aerosol opacities

WAVNUMDS.TAB

Table of values for center wavenumber for each of the six detectors when TES is operated in double scan mode

WAVNUMSS.TAB

Table of values for center wavenumber for each of the six detectors when TES is operated in single scan mode