added show/satellite command

[spider.git] / cmd / show / satellite.pl

diff --git a/cmd/show/satellite.pl b/cmd/show/satellite.pl
new file mode 100644 (file)
index 0000000..0f6131d
--- /dev/null
+++ b/cmd/show/satellite.pl
@@ -0,0 +1,56 @@
+#!/usr/bin/perl
+#
+# show satellite az/el 
+#
+# 1999/12/9 Steve Franke K9AN
+#
+# 
+
+my ($self, $satname) = @_;
+my @out;
+
+my ($lat, $lon, $alt, $jtime); # lats and longs in radians
+my ($sec, $min, $hr, $day, $mon, $yr) = (gmtime($main::systime))[0,1,2,3,4,5];
+#printf("%2.2d %2.2d %2.2d %2.2d %2.2d\n",$min,$hr,$day,$mon,$yr);
+
+$mon++;
+$yr += 1900;
+$lat=$main::mylatitude;
+$lon=$main::mylongitude;
+$alt=0.0;
+
+$jtime=Sun::Julian_Day($yr,$mon,$day)+$hr/24+$min/60/24;
+($yr,$mon,$day,$hr,$min)=Sun::Calendar_date_and_time_from_JD($jtime);
+#printf("%2.2d %2.2d %2.2d %2.2d %2.2d\n",$min,$hr,$day,$mon,$yr);
+push @out,sprintf("Tracking table for $satname");
+push @out,sprintf("dd/mm  UTC   Lat    Lon    Alt(km)  Az     El   Dist(km)");
+my ($slat,$slon,$salt,$az,$el,$distance)=
+       Sun::get_satellite_pos(
+         $jtime,$lat*$d2r,$lon*$d2r,$alt,$satname);
+push @out,sprintf(   # print the current satellite position
+       "Now   %2.2d:%2.2d %6.1f %6.1f %6.1f  %6.1f %6.1f %6.1f", 
+       $hr,$min,$slat*$r2d,$slon*$r2d,$salt,
+       $az*$r2d,$el*$r2d,$distance);
+
+my $numsteps=0;
+my $step = 2; # tracking table resolution in minutes
+$jtime=$jtime+$step/24/60;
+while ( $numsteps < 6*60/$step ) # for now, look 6 hours ahead for tracking table
+       {
+       my ($yr,$mon,$day,$hr,$min)=Sun::Calendar_date_and_time_from_JD($jtime);
+       my ($slat,$slon,$salt,$az,$el,$distance)=
+               Sun::get_satellite_pos(
+               $jtime,$lat*$d2r,$lon*$d2r,$alt,$satname);
+       if( $el*$r2d > -5 ) {
+               push @out,sprintf(
+                       "%2.2d/%2.2d %2.2d:%2.2d %6.1f %6.1f %6.1f  %6.1f %6.1f %6.1f", 
+                       $day,$mon,$hr,$min,$slat*$r2d,$slon*$r2d,$salt,
+                       $az*$r2d,$el*$r2d,$distance);
+               }
+       $numsteps++;
+       $jtime=$jtime+$step/60/24;
+       }
+
+return (1,@out);
+
+