The Tether Satellite System (TSS) was a space shuttle based mission. There were two flights of the TSS system. They were TSS-1 and TSS-1R. The TSS-1 mission occurred between August 3 and August 5 of 1992. The TSS-1 mission failed to deploy the TSS spacecraft from the orbiter bay. NASA safety and quality control inserted an extra bolt within the deployer and this bolt caused the deployer system to fail. It seems that there was not enough clearance for the tether to unreel from its spool. This issue was repaired and a reflight of the TSS-1 spacecraft occurred between 22 February and 1 March 1996. During the reflight, the TSS satellite was almost completely reeled out when enough pressure built up within the deployer mechanism to cause an electrical short which generated enough energy to break the tether. The TSS spacecraft drifted off, away from the shuttle and eventually burned in the atmosphere. During the TSS-1R mission, some timing issues occurred. These timing issues were corrected. The original data files were archived (including the timing errors) and placed under the TSS-1Ro heading. Thus, the TSS-1R contains time corrected data. Data science from the TSS flight was originally stored in the Instrument Data File Set (IDFS) format (http://www.idfs.org/). Data and documents from the TSS flights were stored at Marshall Space Flight Center (MSFC) and a copy of these data files were archived as back-up at Southwest Research Institute (SwRI). In the time since the TSS mission, the TSS data was lost at MSFC. In 2017, the TSS data was recalled from the SwRI archive, converted into the Common Data Format (CDF - https://cdf.gsfc.nasa.gov/), and stored in the Space Physics Data Facility (SPDF) archive. Data in this archive was validated by comparing CDF images with IDFS images. Different software programs were used to compare IDFS data with CDF data, so exact comparison is not expected due to the differences in the display software. The CDF is drawn using the gPlot program whereas IDFS data is drawn using the SpectroScalar program. Both programs are available through the Southwest Data Display and Analysis System (SDDAS - http://www.sddas.org/). Differences observed in the data images are discussed below. 1) Data Range - The CDF images do not show as much depth as the IDFS images due to differences in the imaging programs. With gPlot, the image from the CDF is composed of the last item written into the pixel. gPlot holds a stack of spectra at each pixel to allow for panning and zooming. SpectroScalar does not allow panning and zooming, but displays the IDFS values as averages of all spectral data that falls within a pixel. As a result, the SpectroScalar image of IDFS data shows a different data range because data in a pixel has been averaged; whereas, the gPlot CDF image just shows the last spectrum in the pixel. 2) Plot Resolution - In some cases the IDFS image from SpectroScalar does not show data on the same axis scale as the CDF image using gPlot. Images from the auto scale using gPlot show the full variation in the data, which can mean scale variations down to the sixth decimal place are displayed; whereas, IDFS in SpectroScalar does not auto scale draw to this resolution. Thus, what appears as a straight line in SpectroScalar can appear as a line with slope in gPlot. 3) Color Differences - gPlot images use a slightly different color bar to draw the CDF file contents than do images from SpectroScalar drawing IDFS data. Image differences can be detected which are caused by differences in the color bar used by the two programs rather than in the data. 4) Data Gaps - CDF data drawn with gPlot shows locations where gaps in the data occur. SpectroScalar masks these gaps by drawing lines between IDFS data values, making it appear that there is continuous data. 5) Plot Bins - SpectroScalar drawing IDFS allows for a definition of binning. The same is not true for the CDF using gPlot. Some of the TSS instruments step through and collect spectral data in a random order, or a non-predictable order. Setting binning allows spectral data in IDFS to be placed in its proper dependent location along with time. The result is the appearance of a time dependent spectrum. However, since gPlot drawing the CDF picks up and uses only the first location of the dependent variable with time, the result appears as a single line drawn across time and is not placed at the correct dependent location. The TSS data from SwRI includes anomalies from the recording of the TSS and shuttle telemetry. It is assumed that the IDFS data stored at MSFC has telemetry anomalies flagged and/or removed. In some cases, errors were discovered in the IDFS data files at SwRI which precluded the data from analysis. These errors affected the reading of the data files and not the data themselves (for example, file pointers had negative values). The archived copy of the IDFS files at SwRI were fixed in these cases so that the correct data is recovered at the correct time. It is assumed that the data files stored at MSFC had to correct these data files in order to access the data in these files, so the best data was not archived at the back-up site. During the review of TSS data, it was noticed that some data files were written with timing offsets which placed the data in time locations covered by other data records. Although this seemed like an odd situation, it is a possible state under IDFS. Since no evidence could be found that this situation was incorrect, it was left as is with the assumption that the original timing was defined correctly. It is assumed that if the timing was adjusted differently, it would be reflected in the original data files stored at MSFC. January 19, 2018 CDF_Plots directory contains plots generated using SwRI's gPlot software and the generated CDF data. Organization: For TSS-1 and TSS-1R: The png plots are located in subdirectories based on the instrument. For example, the TSS-1R ROPE png plots are located in directory CDF_Plots/TSS/TSS-1R/ROPE There are 12 TSS-1 and TSS-1R instrument subdirectories: CAS - Shuttle Calibration Ancillary System Parameters DCORE - Deployer Core Equipment Measurements DPLY - Deployer 16/major Frame Miscellaneous Housekeeping DRB - Deployable-Retrievable Boom EMP - End-Mass Payload - Accelerometer, Tensiometer, Magnetometer RETE - Research on Electrodynamic Tethered Effects ROPE - Research on Orbital Plasma Electrodynamics SAHK - Satellite Housekeeping SCORE - Satellite Core Equipment Measurements SETS - Shuttle Electrodynamic Tethered System SPREE - Shuttle Potential and Return Electron Experiment TEMAG - TSS Magnetic Field Experiment For TSS-1Ro: The png plots for all the TSS-1Ro data are located in directory CDF_Plots/TSS/TSS-1Ro January 19, 2018 IDFS_Plots directory contains plots generated using SwRI's SDDAS software and the IDFS data. Organization: For TSS-1 and TSS-1R: The png plots are located in subdirectories based on the instrument. For example, the TSS-1R ROPE png plots are located in directory IDFS_Plots/TSS/TSS-1R/ROPE There are 12 TSS-1 and TSS-1R instrument subdirectories: CAS - Shuttle Calibration Ancillary System Parameters DCORE - Deployer Core Equipment Measurements DPLY - Deployer 16/major Frame Miscellaneous Housekeeping DRB - Deployable-Retrievable Boom EMP - End-Mass Payload - Accelerometer, Tensiometer, Magnetometer RETE - Research on Electrodynamic Tethered Effects ROPE - Research on Orbital Plasma Electrodynamics SAHK - Satellite Housekeeping SCORE - Satellite Core Equipment Measurements SETS - Shuttle Electrodynamic Tethered System SPREE - Shuttle Potential and Return Electron Experiment TEMAG - TSS Magnetic Field Experiment For TSS-1Ro: The png plots for all the TSS-1Ro data are located in directory IDFS_Plots/TSS/TSS-1Ro