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Detailed Tabular Output

The detailed tabular data provides accurate information about the pass for the duration of the pass. The table is composed of 7 columns:

  1. Local Time (assuming that the GMT to local conversion value on the input tab is correct) - Look for an asterisk (*) after the time to see if SkyWatch has found a sighting! An asterisk (*) indicates that all constraints have been met.

  2. Azimuth - the angle in degrees measured from due North to the East of the satellite location with respect to the observer. For example, an azimuth of 0.0 degrees is North, 90 degrees is due East, 180 degrees is due South, and 270 degrees is due West.

  3. Elevation - the angle in degrees above the horizon. The table starts at approximately Acquisition of Signal, or Satellite Rise, and ends at approximately Loss of Signal, or Satellite Set.

  4. Range - the distance in nautical miles from the observer to the satellite.

  5. Solar Altitude - The angle in degrees that the Sun is above or below the horizon with respect to the satellite. A positive value indicates that the satellite is in orbital daylight and negative indicates orbital darkness.

  6. Solar Separation - Also known as solar elongation, this value is the angle in degrees between the observer, the Sun, and the satellite. This value determines if the lit side of the satellite is facing the observer. Values between zero and ~90 degrees indicate that the lit side of the satellite is facing away from the observer. Values from ~90 degrees to 180 degrees indicate that the lit side is facing the observer and a sighting may be possible.

  7. SRSS - (Square Root of Summation of Squares) This value gives the angle in degrees that the Sun is above or below the horizon with respect to the observer. Positive values indicate the Sun is above the horizon while negative values indicate the Sun is below the horizon.

The table will run from Satellite Rise to Satellite Set in steps that can be defined by the user. To change the time increment, look to the Variables tab for assistance.

Note that ordinarily, the digital data runs for the duration of the sighting. However, this only occurs when the Next Pass or Next Sighting button is selected. The Next Pass function will display the acquisition data from horizon to horizon.


Curator: Kim Dismukes | Responsible NASA Official: Amiko Kauderer | Updated: 09/23/2011
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