| Description: Camera temperature 2 in raw counts. The meaning depends on whether it is being reported by the WAC or NAC. A single telemetry point is used to return the raw value of filter wheel temperature (WAC), FILTER_TEMPERATURE once converted to units of degrees Celsius, or the raw value of telescope temperature (NAC), OPTICS_TEMPERATURE once converted to units of degrees Celsius, depending on which camera is in use. For the WAC, this is temperature of the filter wheel. Thus, FILTER_TEMPERATURE is 'N/A' if the NAC was used for the observation because the telemetry point will be a measurement of the NAC telescope temperature. For the WAC the conversion from raw counts to degrees Celsius is: T = -292.7603 + Raw * 0.5553 where Raw is the raw counts in MESS:CAM_T2. For the NAC, this is temperature of the NAC telescope. Thus OPTICS_TEMPERATURE is 'N/A' if the WAC was used for observation because the telemetry point will be a measurement of the WAC filter wheel temperature. For the NAC the conversion from raw counts to degrees Celsius is: T = -269.7180 + Raw * 0.4861 where Raw is the raw counts in telemetry (mess.mdis.cam_t2). |