The mission dictionary for NEAR to support the PDS3 to 4 migration. NEAR mission related properties Observation related properties This section contains the simpleTypes that provide more constraints than those at the base data type level. The simpleTypes defined here build on the base data types. This is another component of the common dictionary and therefore falls within the common namespace. The INSTRUMENT_TEMPERATURE element provides the temperature, in degrees Celsius, of an instrument or some part of an instrument. The inst_cmprs_quantz_tbl_id element identifies the reference table used for quantization in the frequency domain for on-board transform compression. This name or code should be specific enough to allow the user of the data to have sufficient information to reference the quantization table used to compress the data. The instrument_mode element provides the name of the mode the grs instrument was operating in at the time of the observation. The sequence_table_id element provides an unique identified for the sequence table that was used for a set of observations. The sequence table provides the image acquistion sequences that specify the camera and filter image sequencing. It indicates the order in which cameras are shuttered and the order for which filters are used. The sequence_title element provides the title assigned to a particular observation sequence during planning or data processing. MET of image acquisition in seconds. MET corresponds to the last spacecraft 1-Hz pulse before the end of image integration, i.e., 918 ms before the end of image integration. See Murchie et al. (1998) [MURCHIEETAL1998] for a detailed explanation of timing of the 1 Hz pulse relative to image exposure. MET of image acquisition in seconds. MET corresponds to the last spacecraft 1-Hz pulse before the end of image integration, i.e., 918 ms before the end of image integration. See Murchie et al. (1998) [MURCHIEETAL1998] for a detailed explanation of timing of the 1 Hz pulse relative to image exposure.