bands. A single uncompressed image uses up to 28Gbit. However, these images are transmitted compressed, with a typical maximum size of 11.2 gigabits. These images are released to the general public on the HiRISE website via a new format called JPEG 2000. To facilitate the mapping of potential landing sites, HiRISE can produce stereo pairs of images from which the topography can be measured to an accuracy of 0.25 meter. Images naming conventions HiRISE images are available to the public, so it can be useful to know how they are named. This is an excerpt from the official documentation: Name: ppp_oooooo_tttt_ffff_c.IMG ppp = Mission Phase: INT = Integration and Testing CAL = Calibration Observations ATL = ATLO Observations KSC = Kennedy Space Center Observations SVT = Sequence Verification Test LAU = Launch CRU = Cruise Observations APR = Mars Approach Observations AEB = Aerobraking Phase TRA = Transition Phase PSP = Primary Science Orbit (nov 2006-nov 2008) REL = Relay phase E01 = 1st Extended Mission Phase if needed Exx = Additional extended Missions if needed oooooo = MRO orbit number tttt = Target code 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) The target code refers to the latitudinal position of the center of the planned observation relative to the start of 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 observations. Examples of target code: 0000 – planned observation at the equator on descending side of orbit. 0900 – planned observation at the south pole. 1800 – planned observation at the equator on the ascending side (day side) of the orbit. 2700 – planned observation at the north pole. Off-Mars and Special Observations Values: 4000 – Star Observation 4001 – Phobos Observation 4002 – Deimos Observation 4003 – Special Calibration Observation Footnotes