HP3 radiometer calibration data acquired on Earth in response to changes in temperature of the open dust cover/calibration target and environmental temperature for the sensors observing the spot farther from the lander.

This data was acquired in the radiometric calibration setup in the Space Simulation Chamber at DLR, Berlin, Germany. The setup consists of a pressure vessel filled with 8 mbar Argon, a cavity blackbody and a thermal shroud, together simulating the thermal environment at the InSight landing site on Mars. The radiometer is mounted in the thermal shroud with the three sensors of field of view (FoV) 2 observing the blackbody. The sensors of FoV 1 observe the thermal shroud and the data should not be used. In this data set the dust cover is open. The dust cover functions as a calibration target and a fraction of the FoV is observing it even in the open state. The data here was acquired during tests when the calibration target temperature was varied to provide the calibration stimulus, while the cavity blackbody temperature was kept constant.<br><br>The data file has columns for start and end time of measurements at each calibration point in seconds since the epoch J2000 and number of data vectors averaged. The other columns are <br>UtcXY : thermopile voltage where X indicates FoV and Y indicates sensor numberTrefXY : thermopile temperature where X indicates FoV and Y indicates sensor numberTsh : radiometer sensor head temperatureTct : calibration target temperaturePsh : sensor head heater powerPct: calibration target heater powerTbb: cavity blackbody temperatureTenv: thermal shroud temperature