| DATA_SET_DESCRIPTION |
Data Set Overview
=================
243 Ida radiance Near Infrared Mapping Spectrometer point spectra data
description
1 - INTRODUCTION
This data volume contains a radiometrically corrected point spectra of
asteroid 243 Ida and a spectrum of the asteroid satellite Dactyl as
acquired by the Galileo spacecraft Near Infrared Mapping Spectrometer
(NIMS, Carlson et al., 1992) on August 28, 1993 (Carlson et al., 1994).
They record the spectra collected as the Galileo spacecraft approached the
243 Ida system. These data are products of the calibration of the raw data
number files idu002tn.qub, idu005tn.qub, idu006tn.qub, idu007tn.qub,
idu019tn.qub, idu020tn.qub, idu022tn.qub, idu028tn.qub, idu032tn.qub,
idu033tn.qub, and idu035tn.qub (DATA SET ID ='GO-A-NIMS-3-TUBE-V1.0') with
calibration factors (DATA SET ID = 'GO-J-NIMS-4-MOSAIC-V1.0') acquired
during the Jovian tour of the Galileo mission. These raw data .qub files
are archived in the Imaging Node of the NASA Planetary Data System (PDS).
These calibrated spectra consist of radiance and incidence/flux
measurements for wavelengths between 0.7 - 5.2 micrometers. The data
files are named by combining the target name, the Galileo spacecraft clock
value at the start of the observation, and the data product type. For
instance 'ida2025514radiance.tab' is a combination of the target name
'Ida', the spacecraft clock time of '2025514', and the 'radiance' data
type. The .tab suffix indicates that the file is a PDS formatted text
table file. The 'reflectance' data type refers to files that contain
incidence/flux spectra.
2 - DATA OVERVIEW TABLE
File Bands Object Observation Target
Start(UT) Distance(km)
ida2025514radiance.tab 17 243 Ida 14:57:59 83244.2
ida2025514reflectance.tab 17 243 Ida 14:57:59 83244.2
ida2025537radiance.tab 17 243 Ida 15:21:13 66040.8
ida2025537reflectance.tab 17 243 Ida 15:21:13 66040.8
ida2025541radiance.tab 17 243 Ida 15:25:25 64069.1
ida2025541reflectance.tab 17 243 Ida 15:25:25 64069.1
ida2025552radiance.tab 17 243 Ida 15:37:07 55639.0
ida2025552reflectance.tab 17 243 Ida 15:37:07 55639.0
ida2025560radiance.tab 17 243 Ida 15:44:29 33021.8
ida2025560reflectance.tab 17 243 Ida 15:44:29 33021.8
ida2025564radiance.tab 17 243 Ida 15:48:39 47087.6
ida2025564reflectance.tab 17 243 Ida 15:48:39 47087.6
ida2025587radiance.tab 17 243 Ida 16:11:57 29819.8
ida2025587reflectance.tab 17 243 Ida 16:11:57 29819.8
ida2025605radiance.tab 379 243 Ida 16:29:54 14694.7
ida2025605reflectance.tab 379 243 Ida 16:29:54 14694.7
ida2025609radiance.tab 396 243 Ida 16:33:53 12689.3
ida2025609reflectance.tab 396 243 Ida 16:33:53 12689.3
ida2025612radiance.tab 51 243 Ida 16:37:45 10356.6
ida2025612reflectance.tab 51 243 Ida 16:37:45 10356.6
dactyl2025622radiance.tab 17 Dactyl 16:47:45 3957.0
dactyl2025622reflectance.tab 17 Dactyl 16:47:45 3957.0
3 - GALILEO MISSION DESCRIPTION
Galileo was a mission to Jupiter to perform long-term studies of the
Jovian atmosphere and detailed studies of the Galilean satellites (Jet
Propulsion Laboratory Interoffice Memorandum GLL-NAV-92-90, 1992). It
consisted of a two part spacecraft, an orbiter and an atmospheric probe.
Both components were launched from the space shuttle Atlantis on October
18, 1989. The orbiter contained remote sensing, particles, and wave
sensors. The remote sensing instruments included the Solid State Imager
and the Near Infrared Mapping Spectrometer. The atmospheric probe
contained in-situ sensors to directly measure the atmosphere of Jupiter.
The Galileo spacecraft encountered Venus (February 10, 1990), the Earth
Moon system (December 8, 1990 and December 8, 1992), asteroid 951 Gaspra
(October 29, 1991), asteroid 243 Ida (August 28, 1993) before entering the
orbit of Jupiter on December 8, 1995. This data set is from the asteroid
243 Ida encounter. The Galileo mission investigated the Jovian system by
deploying its atmospheric probe on July 13, 1995 and conducting
observations until plunged into Jupiter on September 21, 2003.
4 - INSTRUMENT DESCRIPTION
The Near Infrared Mapping Spectrometer (Carlson et al., 1992) instrument
was an imaging spectrometer covering the wavelength region 0.7 to 5.2
micrometers. Its spectral resolution is 0.025 micron beyond 1 micron, and
0.0125 microns below 1 micron, yielding 204 spectral elements in nominal
mode. The nominal pixel size is a square 0.5 x 0.5 milliradians. The
instrument acquires data in the order: (1) sampling of 17 detectors, (2)
stepping of the scan mirror (20 elements in cross-cone), (3) stepping of
the grating (nominally 12 steps per cycle). The nominal 204 wavelength
cycle requires 4 1/3 seconds. The detectors (2 silicon, 15 indium
antimonide) sample approximately uniformly across the spectrum. The
stepping of the grating provided NIMS with a variety of spectral data
collection modes that ranged from 17 channels (no grating step movements)
to 408 channels (24 grating step movements).
5 - 243 IDA ASTEROID ENCOUNTER NIMS OBSERVATIONS
The Galileo spacecraft performed a flyby encounter of the 243 Ida asteroid
system with its closest approach occurring at 16:52:04 on August 28, 1993
UTC. The closest approach was at 243 Ida's dark
side, 75 degrees south ecliptic latitude, at a 2400 kilometer range.
NIMS conducted two types of science observations; the rotation
observations and the 'close-in' observations. The rotation portion covered
approximate 390 degrees of 243 Ida rotation starting at -322 rims from
closest approach. A rim is a unit of Galileo spacecraft clock time that is
60 2/3 seconds in length. NIMS acquired samples every 90 degrees (17 and
408 channel modes), 30 degrees (102 channel mode), and 15 degrees (102
channel mode) of rotation. The 'close-in' portion covers from -28 rims
prior to closest approach (the end of the rotation observations) to 1 rim
after closest approach. At -28 rims and -22 rims, NIMS acquired two 204
channel mode samples. At -11 rims before closest approach, NIMS observed
243 Ida in the 102 channel mode to determine asteroid composition. From -5
rims to 1 rim, collaborative NIMS and Galileo Solid State Imager (SSI)
observations were taken; NIMS acquires data in a 17 channel mode at the
highest spatial resolution possible for the 243 Ida Encounter. NIMS also
rode along in the 17 channel mode on additional SSI observations from -1
to +1 Rim to obtain the highest possible spatial resolution data on the
asteroid. Radiometric and photometric calibration observations were
conducted by NIMS after the completion of the science observation
sequence.
The products in this data volume are a subset of the spatially unresolved
NIMS observations of the 243 Ida system. The Galileo mission at the time
of the 243 Ida encounter did not have an operational high gain antenna to
relay the data back to Earth. The observations were recorded to a
spacecraft tape recorder a played back to Earth. A subset of the
collected NIMS data was relayed back to Earth. The data set was further
reduced in number by calibrating only the data that had significant target
signal. The number of spectral channels was also reduced to those that
could be calibrated. This reduction was primarily due to the erroneous
scan platform motion that occurred during the 243 Ida encounter. This
motion offset asteroid 243 Ida in the NIMS aperture/slit during the sensor
scan sequence. This motion resulted in a varying intensity of the 243 Ida
signal as the NIMS sensor collected data. In these instances, only the
data from the first grating step were calibrated.
6 - DATA FILE FORMAT DESCRIPTION
The data files for the 243 Ida radiance Near Infrared Mapping Spectrometer
point spectra are ASCII (American Standard Code for Information
Interchange) text files. Each data file contains columns of floating
point numeric values separated by spaces. The radiance files consist of
columns of wavelength values (micrometers), radiance
(microwatts*centimeters**-2*steradians** -1*micrometers**-1), and
instrument radiance precision (microwatts*centimeters**-2*steradians**
-1*micrometers**-1). The reflectance files consist of columns of
wavelength values (micrometers), reflectance (a ratio of incidence/flux),
and instrument reflectance precision (a ratio of incidence/flux precision
values). The calibration files consist of columns of wavelength values
(micrometers), sensitivity
(micrometers*steradians*centimeters**2*microwatts**-1), and dark values
(data number). The solar files consist of columns of wavelength values
(micrometers), and solar radiance (microwatts*centimeters**-2*steradians**
-1*micrometers**-1).
7 - DATA PROCESSING HISTORY
The radiance data in this data volume are derived from archived NIMS
spectral images files available from the NASA PDS Imaging Node. The 243
Ida and Dactyl NIMS observations are archived in the Imaging Node as
spectral image files of data number or instrument count values (DATA SET
ID ='GO-A-NIMS-3-TUBE-V1.0'). These data number values were converted into
radiance using the following equation: radiance value = (data number value
- dark value)/sensitivity value. The dark value was determined through an
average of background sky pixels for the observation. The sensitivity
value was obtained from recorded values used to process the NIMS
observations of the Jupiter satellites Europa and Ganymede (DATA SET ID =
'GO-J-NIMS-4-MOSAIC-V1.0') that employed the same instrument collection
modes and gains as the 243 Ida observations. The reflectance or
incidence/flux values were calculated through a ratio of the radiance
spectra over solar radiance spectrum. These reflectance values were scaled
by a pixel fill factor determined by the coverage of a NIMS pixel by the
aspect of the target as imaged by the Galileo Solid State Imager. The
solar radiance spectra were created through an application of the inverse
square law of radiance propagation to solar values archived in a NIMS Io
observation (DATA SET ID = 'GO-J-NIMS-4-MOSAIC-V1.0'). The inverse square
law was used to convert the solar radiance values at Io's distance to
those that would be observed at asteroid 243 Ida. The point spectra in
this data volume are the radiance or incidence/flux values of the single
pixel in the processed spectral image that contained data from the
spatially unresolved 243 Ida or Dactyl. File specific processing
information can be found in the following paragraphs of this section.
The file ida2025514radiance.tab is derived from DN values from line 5
sample 11 in PDS file IDU019TN.QUB (DATA SET ID GO-A-NIMS-3-TUBE-V1.0) and
calibrated with values from the PDS file G2C002CI.QUB (DATA SET ID
GO-J-NIMS-4-MOSAIC-V1.0).
The file ida2025514calib.tab contains the calibration values from the PDS
file G2C002CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0) used to create
ida2025514radiance.tab.
The file ida2025514reflectance.tab is derived by a ratio of radiance
values from ida2025514radiance.tab with solar radiance values derived from
the PDS file C3I002CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0). A 28%
pixel fill factor was used based on corresponding Galileo Solid State
Imager imagery.
The file ida2025514solar.tab contains the solar radiance derived from the
PDS file C3I002CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0) used to create
ida2025514reflectance.tab. Sun and target distances used in the inverse
square law calculations to model solar values at the target used the SPICE
Tool Kit and the SPICE files s970311a.bsp, naif0008.tls, mips010314.tpc,
and mk00062a.tsc.
The file ida2025537radiance.tab is derived from DN values from line 14
sample 11 in PDS file IDU020TN.QUB(DATA SET ID =GO-A-NIMS-3-TUBE-V1.0) and
calibrated with values from the PDS file C3E001CI.QUB (DATA SET ID
GO-J-NIMS-4-MOSAIC-V1.0).
The file ida2025537calib.tab contains the calibration values from the PDS
file C3E001CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0) used to create
ida2025537radiance.tab.
The file ida2025537reflectance.tab is derived by a ratio of radiance
values from ida2025537radiance.tab with solar radiance values derived from
the PDS file C3I002CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0). A 19%
pixel fill factor was used based on corresponding Galileo Solid State
Imager imagery.
The file ida2025537solar.tab contains the solar radiance derived from the
PDS file C3I002CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0) used to create
ida2025537reflectance.tab. Sun and target distances used in the inverse
square law calculations to model solar values at the target used the SPICE
Tool Kit and the SPICE files s970311a.bsp, naif0008.tls, mips010314.tpc,
and mk00062a.tsc.
The file ida2025541radiance.tab is derived from DN values from line 4
sample 11 in PDS file IDU035TN.QUB (DATA SET ID GO-A-NIMS-3-TUBE-V1.0) and
calibrated with values from the PDS file C3E001CI.QUB (DATA SET ID
GO-J-NIMS-4-MOSAIC-V1.0).
The file ida2025541calib.tab contains the calibration values from the PDS
file C3E001CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0) used to create
ida2025541radiance.tab.
The file ida2025541reflectance.tab is derived by a ratio of radiance
values from ida2025541radiance.tab with solar radiance values derived from
the PDS file C3I002CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0). A 50%
pixel fill factor was used based on corresponding Galileo Solid State
Imager imagery.
The file ida2025541solar.tab contains the solar radiance derived from the
PDS file C3I002CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0) used to create
ida2025541reflectance.tab. Sun and target distances used in the inverse
square law calculations to model solar values at the target used the SPICE
Tool Kit and the SPICE files s970311a.bsp, naif0008.tls, mips010314.tpc,
and mk00062a.tsc.
The file ida2025552radiance.tab is derived from DN values from line 6
sample 11 in PDS file IDU028TN.QUB (DATA SET ID GO-A-NIMS-3-TUBE-V1.0) and
calibrated with values from the PDS file C3E001CI.QUB (DATA SET ID
GO-J-NIMS-4-MOSAIC-V1.0).
The file ida2025552calib.tab contains the calibration values from the PDS
file C3E001CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0) used to create
ida2025552radiance.tab.
The file ida2025552reflectance.tab is derived by a ratio of radiance
values from ida2025552radiance.tab with solar radiance values derived from
the PDS file C3I002CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0). A 100%
pixel fill factor was used based on corresponding Galileo Solid State
Imager imagery.
The file ida2025552solar.tab contains the solar radiance derived from the
PDS file C3I002CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0) used to create
ida2025552reflectance.tab. Sun and target distances used in the inverse
square law calculations to model solar values at the target used the SPICE
Tool Kit and the SPICE files s970311a.bsp, naif0008.tls, mips010314.tpc,
and mk00062a.tsc.
The file ida2025560radiance.tab is derived from DN values from line 41
sample 12 in PDS file IDU022TN.QUB (DATA SET ID GO-A-NIMS-3-TUBE-V1.0) and
calibrated with values from the PDS file C3E001CI.QUB (DATA SET ID
GO-J-NIMS-4-MOSAIC-V1.0).
The file ida2025560calib.tab contains the calibration values from the PDS
file C3E001CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0) used to create
ida2025560radiance.tab.
The file ida2025560reflectance.tab is derived by a ratio of radiance
values from ida2025560radiance.tab with solar radiance values derived from
the PDS file C3I002CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0). A 100%
pixel fill factor was used based on corresponding Galileo Solid State
Imager imagery.
The file ida2025560solar.tab contains the solar radiance derived from the
PDS file C3I002CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0) used to create
ida2025560reflectance.tab. Sun and target distances used in the inverse
square law calculations to model solar values at the target used the SPICE
Tool Kit and the SPICE files s970311a.bsp, naif0008.tls, mips010314.tpc,
and mk00062a.tsc.
The file ida2025564radiance.tab is derived from DN values from line 6
sample 11 in PDS file IDU032TN.QUB (DATA SET ID GO-A-NIMS-3-TUBE-V1.0)
calibrated with values from the PDS file C3E001CI.QUB (DATA SET ID
GO-J-NIMS-4-MOSAIC-V1.0).
The file ida2025564calib.tab contains the calibration values from the PDS
file C3E001CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0) used to create
ida2025564radiance.tab.
The file ida2025564reflectance.tab is derived by a ratio of radiance
values from ida2025564radiance.tab with solar radiance values derived from
the PDS file C3I002CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0). A 25%
pixel fill factor was used based on corresponding Galileo Solid State
Imager imagery.
The file ida2025564solar.tab contains the solar radiance derived from the
PDS file C3I002CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0) used to create
ida2025564reflectance.tab. Sun and target distances used in the inverse
square law calculations to model solar values at the target used the SPICE
Tool Kit and the SPICE files s970311a.bsp, naif0008.tls, mips010314.tpc,
and mk00062a.tsc.
The file ida2025587radiance.tab is derived from DN values from line 8
sample 11 in PDS file IDU033TN.QUB (DATA SET ID GO-A-NIMS-3-TUBE-V1.0) and
calibrated with values from the PDS file C3E001CI.QUB (DATA SET ID
GO-J-NIMS-4-MOSAIC-V1.0).
The file ida2025587calib.tab contains the calibration values from the PDS
file C3E001CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0) used to create
ida2025587radiance.tab.
The file ida2025587reflectance.tab is derived by a ratio of radiance
values from ida2025587radiance.tab with solar radiance values derived from
the PDS file C3I002CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0). A 50%
pixel fill factor was used based on corresponding Galileo Solid State
Imager imagery.
The file ida2025587solar.tab contains the solar radiance derived from the
PDS file C3I002CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0) used to create
ida2025564reflectance.tab. Sun and target distances used in the inverse
square law calculations to model solar values at the target used the SPICE
Tool Kit and the SPICE files s970311a.bsp, naif0008.tls, mips010314.tpc,
and mk00062a.tsc.
The file ida2025605radiance.tab is derived from DN values from line 4
sample 13 in PDS file IDU006TN.QUB (DATA SET ID GO-A-NIMS-3-TUBE-V1.0) and
calibrated with values from the PDS file G1E003CI.QUB, C3E001CI.QUB, and
G7G008CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0).
The file ida2025605calib.tab contains the calibration values from the PDS
files G1E003CI.QUB, C3E001CI.QUB, and G7G008CI.QUB (DATA SET ID
GO-J-NIMS-4-MOSAIC-V1.0) used to create ida2025605radiance.tab.
The file ida2025605reflectance.tab is derived by a ratio of radiance
values from ida2025605radiance.tab with solar radiance values derived from
the PDS file C3I002CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0). A 100%
pixel fill factor was used based on corresponding Galileo Solid State
Imager imagery.
The file ida2025605solar.tab contains the solar radiance derived from the
PDS file C3I002CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0) used to create
ida2025605reflectance.tab. Sun and target distances used in the inverse
square law calculations to model solar values at the target used the SPICE
Tool Kit and the SPICE files s970311a.bsp, naif0008.tls, mips010314.tpc,
and mk00062a.tsc.
The file ida2025609radiance.tab is derived from DN values from line 11
sample 13 in PDS file IDU005TN.QUB (DATA SET ID GO-A-NIMS-3-TUBE-V1.0) and
calibrated with values from the PDS files G1E003CI.QUB, C3E001CI.QUB, and
G7G008CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0).
The file ida2025609calib.tab contains the calibration values from the PDS
files G1E003CI.QUB, C3E001CI.QUB, and G7G008CI.QUB (DATA SET ID
GO-J-NIMS-4-MOSAIC-V1.0) used to create ida2025609radiance.tab.
The file ida2025609reflectance.tab is derived by a ratio of radiance
values from ida2025609radiance.tab with solar radiance values derived from
the PDS file C3I002CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0). A 100%
pixel fill factor was used based on corresponding Galileo Solid State
Imager imagery.
The file ida2025609solar.tab contains the solar radiance derived from the
PDS file C3I002CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0) used to create
ida2025609reflectance.tab. Sun and target distances used in the inverse
square law calculations to model solar values at the target used the SPICE
Tool Kit and the SPICE files s970311a.bsp, naif0008.tls, mips010314.tpc,
and mk00062a.tsc.
The file ida2025612radiance.tab is derived from DN values from line 4
sample 16 in PDS file IDU007TN.QUB (DATA SET ID GO-A-NIMS-3-TUBE-V1.0) and
calibrated with values from the PDS file G1E003CI.QUB, C3E001CI.QUB, and
G7G008CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0).
The file ida2025612calib.tab contains the calibration values from the PDS
files G1E003CI.QUB, C3E001CI.QUB, and G7G008CI.QUB (DATA SET ID
GO-J-NIMS-4-MOSAIC-V1.0) used to create ida2025609radiance.tab.
The file ida2025612reflectance.tab is derived by a ratio of radiance
values from ida2025612radiance.tab with solar radiance values derived from
the PDS file C3I002CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0). A 100%
pixel fill factor was used based on corresponding Galileo Solid State
Imager imagery.
The file ida2025612solar.tab contains the solar radiance derived from the
PDS file C3I002CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0) used to create
ida2025612reflectance.tab. Sun and target distances used in the inverse
square law calculations to model solar values at the target used the SPICE
Tool Kit and the SPICE files s970311a.bsp, naif0008.tls, mips010314.tpc,
and mk00062a.tsc.
The file dactyl2025622radiance.tab is derived from DN values from line 5
sample 13 in PDS file IDU002TN.QUB (DATA SET ID GO-A-NIMS-3-TUBE-V1.0) and
calibrated with values from the PDS file C3E001CI.QUB (DATA SET ID
GO-J-NIMS-4-MOSAIC-V1.0). Position vectors are the values for 243 Ida.
Distance and resolution values calculated from Galileo Solid State Imager
imagery.
The file dactyl2025622calib.tab contains the calibration values from the
PDS file C3E001CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0) used to create
dactyl2025622radiance.tab.
The file dactyl2025622reflectance.tab is derived by a ratio of radiance
values from dactyl2025622radiance.tab with solar radiance values derived
from the PDS file C3I002CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0). A
14% pixel fill factor was used based on corresponding Galileo Solid State
Imager imagery.
The file dactyl2025622solar.tab contains the solar radiance derived from
the PDS file C3I002CI.QUB (DATA SET ID GO-J-NIMS-4-MOSAIC-V1.0) used to
create dactyl2025622reflectance.tab. Sun and target distances used in the
inverse square law calculations to model solar values at the target used
the SPICE Tool Kit and the SPICE files s970311a.bsp, naif0008.tls,
mips010314.tpc, and mk00062a.tsc.
8 - POINT SPECTRA SUPPORT INFORMATION
The point spectra support data information can be found in the table file
science_index.tab. This information includes the name of the data file,
the name of the source file archived in the Imaging Node of the PDS, the
instrument spacecraft mission name, the instrument name, the spacecraft
mission phase name, the target of the observation, the instrument
observation type/mode, the observation identifier, the observation start
and stop time (Universal Time), the observation start and stop time in
Julian date, the observation start and stop time as recorded by the
spacecraft clock, the instrument to target center distance (kilometers),
the target to Sun distance (kilometers), the spacecraft to Sun position
vector in the J2000 reference frame (kilometers), the target to Sun
position vector in the J2000 reference frame (kilometers), the target to
Earth distance (kilometers), the spacecraft to Earth position vector in
the J2000 reference frame (kilometers), the Earth to target position
vector in the J2000 reference frame (kilometers), the horizontal pixel
scale (kilometers), the vertical pixel scale (kilometers), the observation
phase angle (degrees), the Earth to spacecraft state vector in the J2000
reference frame (position in kilometers, velocity in kilometers/second),
and the Earth to target state vector in the J2000 reference frame
(position in kilometers, velocity in kilometers/second). These geometry
values were calculated using the SPICE Tool kit and the following SPICE
data files: s970311a.bsp, naif0008.tls, mips010314.tpc, and mk00062a.tsc.
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