Meaning of the columns:

• Time is given in 24 hour form, so 21:05:03 is 9:05 PM. Time is either PST or PDT depending on the season. This the time for the azimuth and maximum elevation that follow.
• Az: azimuth in degrees, North = 0, East = 90, South = 180, West = 270.
• Az': rate of change of azimuth. Positive means moving left-to-right, negative means right-to-left.
• Maxel: maximum elevation in degrees. Anything over 60 is practically overhead.
• Range: in kilometers.
• Sunel: Elevation of the Sun in degrees. 0 is Sunset, -18 is really dark.
• @sat: Elevation of the Sun at the satellite in degrees.
• @sat': rate of change of @sat. Can be used to estimate when the satellite will leave or enter the Earth's shadow.
• DM: distance modulus in astronomical magnitudes. Negative values mean a brighter looking pass.
• The last column is the "age" of the orbital elements in days. Large values mean the prediction is somewhat uncertain.