MRO CRISM Map-Projected Targeted Reduced Data Record (MTRDR)
Instrument: Compact Reconnaissance Imaging Spectrometer for Mars
PDS Data Set ID: MRO-M-CRISM-5-RDR-MPTARGETED-V1.0
For more information about CRISM products, go to the CRISM Product Primer.
For more information about MTRDRs, see the CRISM Data Product SIS.
A map-projected Targeted Reduced Data Record (MTRDR) consists of the TER corrected I/F spectral information after map projection and the removal of spectral channels with suspect radiometry (“bad bands”). The MTRDR spectral product is similar in concept to a local, high-resolution map tile comparable to an MRDR, but at ~12 or ~6 times higher spatial resolution with hyperspectral sampling. The MTRDR product set includes a hyperspectral image cube in units of corrected I/F (IF), spectral summary parameters (SU) derived from the corrected spectral reflectance data, refined spectral summary parameters (SR) which are noise-mitigated versions of the spectral summary parameters, browse products (BR) derived from the refined spectral summary parameters, data processing information maps (IN), a map projected version of the associated IR DDR (DE), and a text table that lists wavelength information (WV) for the spectral image cube. All of the image cubes are 32-bit real, with the exception of the browse products which have been byte-scaled (8 bit).
CRISM Observing Modes Used
|
Mode |
Pointing |
Description |
Coverage |
|---|---|---|---|
|
Targeted (hyperspectral) |
Tracking as shown, once per target |
Full resolution (FRT) Spatial pixels unbinned for target – 18 m/pixel @ 300 km, 10x binned for EPF |
~6500 per Mars year |
|
Half resolution short (HRS) Spatial pixels 2x binned for target – 36 m/pixel @ 300 km, 10x binned for EPF; same swath length as above |
|||
|
Half resolution long (HRL) Spatial pixels 2x binned for target – 36 m/pixel @ 300 km, 10x binned for EPF; twice swath length as above |
Contents of each type of CRISM observation
|
Class of observation |
Frame rate, Hz |
Activity |
Pixel binning |
# |
Wave-lengths |
Frames (typical) |
|---|---|---|---|---|---|---|
|
Full resolution targeted (FRT) |
3.75 |
central scan |
1 |
1 |
545 |
390 |
|
EPF scans |
10 |
10 |
15 |
|||
|
dark sets |
1 |
4 |
12 |
|||
|
Half resolution short targeted (HRS) |
3.75 |
central scan |
2 |
1 |
545 |
243 |
|
EPF scans |
10 |
10 |
15 |
|||
|
dark sets |
2 |
4 |
12 |
|||
|
Half resolution long targeted (HRL) |
3.75 |
central scan |
2 |
1 |
545 |
487 |
|
EPF scans |
10 |
10 |
15 |
|||
|
dark sets |
2 |
4 |
12 |
CRISM MTRDR products have the following file names:
tttnnnnnnnn_mm_aabbbJ_MTR3.IMG (with associated ENVI header and detached PDS label)
where:
ttt = class type
FRT = full resolution targets observation
HRL = half resolution long targeted observation
HRS = half resolution short targeted observation
nnnnnnnn = observation ID, unique for the whole CRISM mission, expressed as a hexadecimal number
mm = ordinal counter carried through from the source EDR, expressed as a hexadecimal number
aa = type of observation
IF = corrected I/F
SU = spectral summary parameters
SR = refined spectral summary parameters
RE = data processing residual maps
DE = derived data product
WV = wavelength information for the I/F image
bbb = macro #
In ODE, MTRDR products have the following Product IDs:
TTTNNNNNNNN_MM_AABBBJ_MTR3