MRO CRISM Calibration Data Record (CDR)

PRODUCTS

FORM FOR EACH FOCAL PLANE

Coefficients for correcting raw housekeeping for effects of lamps, coolers, frame rate

ASCII table, 11 columns (only one file applicable to both VNIR and IR)

Coefficients for calibrating housekeeping from digital to physical units

ASCII table, 5 columns (only one file applicable to both VNIR and IR)

Coefficients to convert housekeeping voltages for perturbations due to current

ASCII table, 7 columns (only one file applicable to both VNIR and IR)

Gain and offset to use for each row for 12 to 14 bit conversion; 12 to 8 bit lookup tables used for each row

ASCII table, 4 columns, 1 per detector

Wavelength tables

ASCII table, 5 columns, 1 per detector

Bandwidth for each row (band) in central columns of each detector at which spectral smile and keystone are minimum

ASCII table, 2 cols VNIR and 11 cols IR, 1 per detector

Center wavelength for each row (band) in central columns of each detector at which spectral smile and keystone are minimum

ASCII table, 2 columns, 1 per detector

12 to 8 bit lookup tables

ASCII table, 1 col of 12-bit input, 8 cols of 8-bit output

8 to 12 bit lookup tables (inverse of 12 to 8)

ASCII table, 8 cols of 8-bit input, 1 col of 12-bit output

Linearity correction

ASCII table, 7 columns, 1 per detector

Bias step function as a function of frame rate and quadrant

ASCII table, 3 columns, 1 per detector

Additive correction of bias to nominal detector operating temperature

ASCII table, 3 columns, 1 per detector

Additive correction of bias to nominal focal plane electronics operating temperature

ASCII table, 3 columns, 1 per detector

Interquadrant ghost removal scaling factors

ASCII table, 6 columns, 1 per detector

Average Mars spectrum for limiting cases in different operating modes

ASCII table, 6 columns, 1 per detector

Saturation limit for each detector quadrant and frame rate

ASCII table, 3 columns, 1 per detector

Valid limits for each detector quadrant and frame rate for 14-bit DN level and noise

ASCII table, 5 columns, 1 per detector

Atmospheric transmission for each wavelength bin averaged over IR columns 270-369 or VNIR columns 260-359, the part of each detector at which spectral smile and keystone are minimum

ASCII table, 2 columns, 1 per detector

Standard telemetry file:  CRISM low-rate telemetry in raw counts, from the beginning of a UTC calendar day to its end.  This is used in preference to the telemetry attached to each image for correction of thermal effects.

ASCII table, 224 columns

Predicted EDR processing table:  Predicted table of EDRs containing scene data and the corresponding EDRs containing time-dependent calibration measurements.  It is constructed from uplinked commands

ASCII table, 21 columns

PRODUCTS

FORM FOR EACH FOCAL PLANE

Digital values of alarm limits and instrument parameters.  Used for validation of uplinked sequences.

ASCII table with columns of start time of applicability, raw digital value, and comments (only one file applicable to both VNIR and IR)

Calibrated physical values of alarm limits.  Used for validation of uplinked sequences.

ASCII table with columns of start time of applicability, value as Celsius, volts, or amps, and comments (only one file applicable to both VNIR and IR)

Digital values of heater and cooler settings.  Used for validation of uplinked sequences.

ASCII table with columns of start time of applicability, raw digital value, and comments (only one file applicable to both VNIR and IR)

Calibrated physical values of heater and cooler settings.  Used for validation of uplinked sequences.

ASCII table to columns of start time of applicability, value as Celsius, and comments (only one file applicable to both VNIR and IR)

Expected compression ratio of data in different instrument configurations.  Used for management of solid state recorder usage.

ASCII table with columns activity, wavelength filter, binning, lossy compression setup, lossless compression setup, and expected compression ratio of data with that configuration.

PRODUCTS

FORM FOR EACH FOCAL PLANE

VERSIONS FOR DIFFERENT PIXEL BINNING/ CHANNEL SELECTION?

VERSIONS FOR DIFFERENT FRAME RATE?

Masks of detector dark columns, scattered light columns, scene columns

2D matrix per detector, 8 bit

Y

N

Nonuniformity file:  time-tagged, row-normalized measurement of detector nonuniformity

Two 2D matrices, 32 bit

Y

Y

Matrices to remove estimated leaked higher order light

Four 2D matrices per detector, 16 bit integer, row numbers

Four 2D matrices per detector, 32 bit, weighting coefficients

Y

N

Sphere spectral radiance at set point (pixel by pixel coefficients to a 2nd order polynomial function of optical bench temperature

Three 2D matrices per detector, 32 bit, for each sphere bulb

Y

N

Shutter position reproducibility correction to sphere radiance (pixel by pixel coefficients to a linear function of the ratio of corrected sphere image to sphere spectral radiance model)

Two 2D matrices per detector, 32 bit, for each sphere bulb

Y

N

Temperature dependence of detector responsivity (pixel by pixel coefficients to a 2nd order polynomial function of detector temperature)

Three 2D matrices per detector, 32 bit

Y

N

Along-slit angle measured from slit center

2D matrix per detector, 32 bit

Y

N

Number of lines by which to shift each column (sample) of an image to minimize the effects of spectral smile

2D matrix per detector, 32 bit

Y

N

Wavelength image (each pixel) determined onground

2D matrix per detector, 32 bit

Y

N

Nearest-neighbor resampled wavelength image (each pixel) determined onground

2D matrix per detector, 32 bit

Y

N

Spectral bandpass, or full width half maximum (each pixel) determined onground

One (VNIR) or ten (IR) 2D matrices per detector, 32 bit

Y

N

Solar flux at 1 AU (for each pixel to take into account spectral smile effects)

2D matrix per detector, 32 bit

Y

N

Nearest-neighbor resampled solar flux at 1 AT (for each pixel to take into account spectral smile effects)

2D matrix per detector, 32 bit

Y

N

Atmospheric transmission as measured from a nadir-pointed hyperspectral scan across Olympus Mons

2D matrix per detector, 32 bit

Y

N

Atmospheric transmission as measured from a nadir-pointed hyperspectral scan across Olympus Mons, nearest-neighbor resampled in the wavelength direction

2D matrix per detector, 32 bit

Y

N

Bad pixel mask:  time-tagged bitmap of bad pixels

2D matrix, 8 bits, per detector

Y

Y

Bias file:  time-tagged, fitted VNIR and IR images extrapolated to zero exposure time

2D matrix, 32 bit, per detector

Y

Y

Background file:  time-tagged, bias- and ghost-subtracted, linearized, averaged VNIR and IR background frames

2D matrix, 32 bit, per detector

Y

Y

Noise file:  time-tagged, image of pixel-by-pixel uncertainties in background images

2D matrix, 32 bit, per detector

Y

Y