MRO HiRISE Experiment Data Record - Raw Image (EDR)

EDR – Experiment Data Record – Raw Image

Instrument: High Resolution Imaging Science Experiment

PDS Data Set ID: MRO-M-HIRISE-2-EDR-V1.0

For more information about HiRISE EDR products, see the HiRISE EDR SIS.

The High Resolution Imaging Science Experiment (HiRISE) Experiment Data Record (EDR) products are the permanent record of the HiRISE raw image data collection. An EDR contains unprocessed image data (except as noted below), ancillary engineering data, and information about the instrument commanding used to acquire the image. An EDR image has the inherent properties of raw and unprocessed data. Data gaps may exist in an EDR primarily due to telemetry communication problems between Mars and Earth. The image pixel values are raw counts not yet radiometrically corrected. No geometric processing has been applied to the data to correct for optical distortion or view geometry.

The format is nearly identical to the original from of the data stream as produced by the instrument. Some processing was applied to the data for (1) FELICS decompressing an image (if the data were optionally compressed on the spacecraft), (2) identifying and filling gaps with “no-data” values, (3) mirroring the pixel order of an image line for data read out in reverse order, and (4) adding a PDS label to the beginning of the file.

The HiRISE EDR is made up of a PDS label, the calibration and observation images and their ancillary data areas.

HiRISE EDR aerobraking phase products have the following file names:

AEB_oooooo_tttt_ffff_c.IMG

where:

oooooo = observation sequence identifier

tttt = observation identification within the observation sequence

ffff = filter/CCD designation

RED0-RED9 = red filter CCDs

IR10-IR11 = near-infrared filter CCDs

BG12-BG13 = blue-green filter CCDs

c = channel number of CCD (0 or 1)

HiRISE EDR post-aerobraking products have the following file names:

ppp_oooooo_tttt_ffff_c.IMG

where:

ppp = mission phase

TRA = transition phase

PSP = primary science phase

ESP = extended science phase

oooooo = MRO orbit number

tttt = target code, refers to the latitudinal position of the center of the planned observation relative to the start of the orbit. The start of orbit is located at the equator on the descending side (night side) of the orbit. A target code of 0000 refers to the start of orbit. The target code increases in value along the orbit track ranging from 0000 to 3595. This convention allows the file name ordering to be time sequential. The first three digits refers to the number of whole degrees from the start of orbit, the fourth digit refers to the fractional degrees rounded to the nearest 0.5 degrees. Values greater than 3595 identify observations as off-Mars or special operations.

Examples:

0000 = equator, descending side of orbit

0900 = south pole

1800 = equator, ascending side

2700 = north pole

Off-Mars and Special Values:

9000 = star observation

9010 = Phobos observation

4002 = Deimos observation

4003 = Special calibration observation

ffff = filter/CCD designation

RED0-RED9 = red filter CCDs

IR10-IR11 = near-infrared filter CCDs

BG12-BG13 = blue-green filter CCDs

c = channel number of CCD (0 or 1)

In ODE, HiRISE EDR products have the following Product IDs:

PPP_OOOOOO_TTTT_FFFF_C