37.9 Instrument and Spacecraft Errors

Each GHRS observation set was processed through the pipeline as far as generic conversion. The output of generic conversion is what users refers to as the raw uncalibrated dataset. Furthermore, the pipeline automatically ran the calhrs software to calibrate science files, such as ACCUMs, RAPIDs, and SPYBALs. Any ACQuisition files, IMAGEs, and DEFCALs are not calibrated.

Each science data file (.d0h), extracted data file (.x0h), and target acquisition (.d1h) have a corresponding data quality file containing flags or fill values for bad data. These quality files (.q0h,.xqh,.q1h) were created during pipeline processing and contain information extracted from the QAC or were filled during the data evaluation process. For each data point in the .d0h, .x0h, or .d1h file, there is a corresponding data point in the quality file. For each good data value, the corresponding point in the quality file is zero. If there are missing data (data-dropout), due to tape recorder flips, down link problems, or data loss due to unforeseen problems, the pipeline will pad the corresponding data file with fill data; the corresponding data point in the quality file was set to 16. If the data failed the Reed-Solomon error check, the corresponding data point in the quality file was set to one. Data that fails the Reed-Solomon check were classified as suspect, and may not be bad data.

Quality Value	Description
0	Good data point
1	Reed-Solomon error
16	Fill data

Pipeline Data Quality Values