1 files changed, 91 insertions, 0 deletions
diff --git a/app/parse_alamanc.pl b/app/parse_alamanc.pl
new file mode 100755
index 0000000..ee946b7
--- /dev/null
+++ b/app/parse_alamanc.pl
@@ -0,0 +1,91 @@
+#!/usr/bin/env perl
+
+use strict;
+use Data::Dumper;
+use Math::Trig;
+
+
+
+sub rad_to_ss($)
+{
+my $r=shift;
+return undef unless defined $r;
+return $r/pi;
+}
+
+
+sub rad_to_d_ss($)
+{
+my $r=shift;
+return undef unless defined $r;
+return ($r/pi)-0.3;
+}
+
+
+sub squirt_bits($$$)
+{
+my ($v,$n,$s)=@_;
+
+#die unless defined $v;
+
+$s=2.0**-$s;
+
+my $i=int(($v*$s) +.5);
+
+my $m=1 << $n;
+if ($i<0) {
+	$i+=$m;
+}
+
+print "v=$v became 0<=$i<$m\n";
+
+my $b=reverse(sprintf ("%0".$n."B",$i));
+
+return $b ." ";
+}
+
+
+
+sub process_sv($)
+{
+my $h=shift;
+my $a="";
+
+
+$a.=squirt_bits($h->{'ID'},32,0);
+$a.=squirt_bits($h->{'week'},32,0);
+$a.=squirt_bits($h->{'Eccentricity'},16,-21);
+$a.=squirt_bits($h->{'Time of Applicability(s)'},8,12);
+
+
+$a.=squirt_bits(rad_to_d_ss($h->{'Orbital Inclination(rad)'}),16,-19);
+$a.=squirt_bits(rad_to_ss($h->{'Rate of Right Ascen(r/s)'}),16,-38);
+$a.=squirt_bits($h->{'SQRT(A)  (m 1/2)'},16,-11);
+$a.=squirt_bits(rad_to_ss($h->{'Right Ascen at Week(rad)'}),24,-23);
+$a.=squirt_bits(rad_to_ss($h->{'Argument of Perigee(rad)'}),24,-23);
+$a.=squirt_bits(rad_to_ss($h->{'Mean Anom(rad)'}),24,-23);
+$a.=squirt_bits($h->{'Af0(s)'},11,-20);
+$a.=squirt_bits($h->{'Af1(s/s)'},11,-38);
+
+
+print Dumper($h);
+}
+
+
+
+my $hash={};
+
+
+while (<>) {
+chomp;
+
+if (/^\*{5}/) {
+	process_sv($hash);
+	$hash={};
+} elsif (/^([^:]+):\s*([^\r\n]+)[\r\n]*$/) {
+	$hash->{$1}=$2;
+}
+}
+
+
+