GOES X-ray sensor inflight relative calibration
Abstract
Whole disk, continuum X-ray measurements in two bandwidths 1/2 - 4A and 1 - 8A are simultaneously observed by two GOES satellites, spatially separated in longitude by about 60 degrees. Ideally solar X-rays should register the same measurement at both satellites but because of instrumental peculiarities and different ambient particle environments the actual measurements recorded are slightly different. A computer program processes one minute averaged measurements obtained from GOES archive data tapes to formulate the linear transformation parameters that relate the X-ray measurements of the primary satellite to those of the secondary satellite. A set of two parameters consisting of a constant offset and proportionality factor is determined for each of the four dynamic ranges for which data is available. Measurements are processed singly and sequentially by means of a Kalman filter to obtain continuously updated values for the unknown model parameters.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- March 1985
- Bibcode:
- 1985STIN...8619368G
- Keywords:
-
- Calibrating;
- Radiation Detectors;
- Satellite-Borne Instruments;
- Solar X-Rays;
- Computer Programs;
- Goes Satellites;
- Kalman Filters;
- Linear Transformations;
- Parameterization;
- Spacecraft Instrumentation