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Annotation of researchv10dc/dist/man/v4/man6/azel.6, revision 1.1.1.1

1.1       root        1: .th AZEL VI 9/22/73
                      2: .sh NAME
                      3: azel \*- obtain satellite predictions
                      4: .sh SYNOPSIS
                      5: .bd azel
                      6: satellite ...
                      7: .sh DESCRIPTION
                      8: .it Azel
                      9: predicts, in convenient form,
                     10: the apparent trajectories of Earth satellites
                     11: whose orbital elements are given in the
                     12: argument files.
                     13: If a given satellite name cannot be read, an attempt is made to find it
                     14: in a directory of satellites maintained by the
                     15: programs's author.
                     16: .s3
                     17: For each satellite given
                     18: the program types its full name,
                     19: the date,
                     20: and a sequence of lines each containing a time,
                     21: an azimuth, an elevation,
                     22: a distance, and a visual magnitude.
                     23: Each such line indicates that:
                     24: at the indicated time,
                     25: the satellite may be seen from Murray Hill at the
                     26: indicated azimuth and elevation, and that its distance
                     27: and apparent magnitude are as given.
                     28: Predictions are printed only when
                     29: the sky is dark (sun more than 5 degrees below the horizon)
                     30: and when the satellite is not eclipsed by the earth's shadow.
                     31: Satellites which have not been seen and verified will
                     32: not have had their visual magnitude level set correctly.
                     33: .s3
                     34: All times input and output by
                     35: .it azel
                     36: are GMT (Universal Time).
                     37: .s3
                     38: The satellites for which elements are maintained are:
                     39: .s3
                     40: .lp +10 10
                     41: sla,|...|sll   Skylab A through Skylab L.
                     42: Skylabs A and B are the laboratory and its rocket
                     43: respectively;
                     44: the remainder are various other objects
                     45: attendant upon its launch and subsequent activities.
                     46: A, B, and probably K have been sighted and verified.
                     47: .s3
                     48: .lp +10 10
                     49: cop    Copernicus I. Never verified.
                     50: .s3
                     51: .lp +10 10
                     52: oao    Orbiting Astronomical Observatory.
                     53: Seen and verified.
                     54: .s3
                     55: .lp +10 10
                     56: pag    Pageos I.
                     57: Seen and verified;
                     58: fairly dim (typically 2nd-3rd magnitude), but elements are extremely accurate.
                     59: .s3
                     60: .lp +10 10
                     61: exp19  Explorer 19; seen and verified,
                     62: but quite dim (4th-5th magnitude) and fast-moving.
                     63: .s3
                     64: .lp +10 10
                     65: c103b, c156b, c184b, c206b, c220b, c461b, c500b
                     66: .br
                     67: Various of the USSR Cosmos series; none seen.
                     68: .s3
                     69: .lp +10 10
                     70: 7276a  Unnamed (satellite # 72-76A); not seen.
                     71: .s3
                     72: .i0
                     73: The element files used by
                     74: .it azel
                     75: contain five lines.
                     76: The first line gives
                     77: a year, month number,
                     78: day, hour, and minute
                     79: at which the program begins its consideration of the satellite,
                     80: followed by a number of minutes and an interval in minutes.
                     81: If the year, month, and day
                     82: are 0, they are taken to be the current date (taken to change at 6 A.M. local time).
                     83: The output report starts at the indicated epoch and
                     84: prints the position of the satellite
                     85: for the indicated number of minutes
                     86: at times separated by the indicated interval.
                     87: This line is ended by two numbers
                     88: which specify options to the program governing
                     89: the completeness of the report; they are ordinarily
                     90: both ``1''.
                     91: The first option flag suppresses output when the sky is not dark;
                     92: the second supresses output when the satellite is eclipsed by the
                     93: earth's shadow.
                     94: The next line of an element file is the full name of the satellite.
                     95: The next three are the elements themselves
                     96: (including certain derivatives of the elements).
                     97: The author should be consulted for more information.
                     98: .sh FILES
                     99: /usr/jfo/el/* \*- orbital element files
                    100: .sh "SEE ALSO"
                    101: sky (VI)
                    102: .sh AUTHOR
                    103: J. F. Ossanna
                    104: .sh BUGS

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