1. Channel and Pixel Labeling

The ground calibration data uses the channel and pixel labeling convention of the EDR data. The channel label conversion is shown in the table below.

EDR Spectral Channel Label	RDR Spectral Channel Label
A1	1
A2	2
A3	3
A4	4
A5	5
A6	6
B1	7
B2	8
B3	9

For the A-telescope spectral channels (RDR channels 1-6), the pixel numbering is the same in EDR and RDR data. For the B-telescope spectral channels (RDR channels 7-9) the pixel numbering is reversed. For example, channel B1 (RDR channel 7) EDR pixel #1 is RDR pixel #21 and EDR pixel #21 is RDR pixel #1.

2. Text Data Files

The ground calibration data files are comma delimited with data in columns. The first row contains column labels which should be self explanatory after reading the accompanying report.

3. Radiometric Calibration Data

The file DLRE_Radiometric_Cal _Report.pdf describes the radiometric calibration tests. The file Diode_Temperatures.csv contains UTC time and the temperature readings of the four diode thermometers on the external blackbodies. The data files have names of the form 2008011018_HSK.csv. These files are EDR files from the instrument, but with 2.048 second time increments between samples. All housekeeping data is sampled at this 2.048 second rate. Detector signals in these files represent averages of the 16 values measured during the 2.048 second interval. To determine which blackbody is being observed, use the elevation actuator angular value (LAST_EL_CMD): 0º is the internal blackbody, 76º is the fixed blackbody, and 111º is the variable blackbody.

The file Rn.csv contains the conversions between temperature and radiance for all channels. The first column in temperature, the other 147 columns are radiance, normalized to 300 K, for the thermal channels (21 pixels each in A3 through A6, 21 pixels each in B1 through B3).

The file Rad300K.csv contains conversion factors from normalized radiance (normalized to 300K) to absolute radiance, in units of W/m²sr. This file has one value for each of the seven thermal channels.

4. Spectral Calibration Data

The file DLRE_Spectral_Test_Report_r1.pdf contains a description of the radiometric calibration tests. Six data files: CH_A1_A2_Spectral.csv, CH_A3_A4_A5_Spectral.csv, CH_A6_Spectral.csv, CH_B1_Spectral.csv, CH_B2_Spectral.csv, and CH_B3_Spectral.csv, contain the test data. Each file contains groups of columns (all labeled). The first column in each group contains a list of wavelengths. The other columns are labeled by channel and pixel number of the detector under test. The second columns in the data files for channels B2 and B3 contain absolute transmission measured for a test filter. These columns contain the ratio of the signal in the detector under test to the signal of the reference detector. Each group of columns represents a single scan over a restricted wavelength range.

5. Field of View Calibration Data

The file DLRE_FOV_Test_Report_revA.pdf describes the field-of-view testing. There are four types of data files, corresponding to the four types of field-of-view measurements.

1. Low-Resolution In-Track Scans: First column is azimuth actuator step position. The remaining columns correspond to detectors in those channels affected by the scan. Data values represent the difference in detector counts between when the target projector shutter is out and when the shutter is in. Azimuth steps can be converted to angle by angle = 0.101º(steps-1000).

2. Low-Resolution Cross-Track Scans: First column is elevation actuator step position. The remaining columns correspond to detectors in those channels affected by the scan. Data values represent the difference in detector counts between when the target projector shutter is out and when the shutter is in. Elevation steps can be converted to angle by angle = 0.101º(steps-1000).

3. High-Resolution Cross-Track Scans: First column is slit position. The remaining columns correspond to detectors in those channels affected by the scan. Data values represent the difference in detector counts between when the target projector shutter is out and when the shutter is in. Slit position in mm is the same as angle in mrad.

4. High-Resolution In-Track Scans: First column is slit position. The remaining columns correspond to detectors in those channels affected by the scan. Data values represent the difference in detector counts between when the target projector shutter is out and when the shutter is in. Slit position in mm is the same as angle in mrad.

In some cases, scans were terminated due to shutter failures and additional scans were performed to complete the angular range (see FOV Test Report). In these cases the files were combined and named as first file in series.

The file IFOV_Positions.csv contains the positions of the fields of view for all detectors relative to the boresight of telescope A (defined as the average of all telescope A detector fields of view). The first column of this file is detector number (1 through 21). The subsequent columns are in-track position for channel A1, cross-track relative position for channel A1, in-track position for channel A2, etc.

6. Alignment Measurements

The file DLRE_Alignment_Report.pdf describes the alignment measurements.