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lib/Astro/Coord/ECI/TLE/Iridium.pm  view on Meta::CPAN

#	Skip it if the mirror angle is greater than the max.

	    next if $angle > $max_mirror_angle;

#	All our approximations may have left us with a satellite which
#	is not quite lit. This happened with Iridium 32 (OID 24945) on
#	Feb 03 2007 at 07:45:19 PM. So we check for illumination one
#	last time.
#	TODO: this calculation should be performed not on the position
#	of the Sun, but on the actual point on the Sun which is
#	reflected to the observer. It looks now like it needs to be done
#	in _flare_calculate_angle_list().

	    ($self->universal ($time)->azel ($illum->universal ($time)))[1] >=
		$self->dip () or next;

#	Calculate all the flare data.

	    my $flare = $self->_flare_char_list ($station, $mma, $angle,
		$time, $illum_vector, $station_vector);

lib/Astro/Coord/ECI/TLE/Iridium.pm  view on Meta::CPAN

	load_module( 'DateTime::TimeZone' );
	1;
    };

    sub _time_in_zone {
	my ( $self, $time ) = @_;

	defined( my $zone = $self->get( 'zone' ) )
	    or return localtime $time;

	looks_like_number( $zone )
	    and return gmtime( $zone * 3600 + $time );

	if ( $date_time_available ) {

	    my $dt = DateTime->from_epoch(
		epoch		=> $time,
		time_zone	=> $zone,
	    );

	    my @localtime = map { $dt->$_() } qw{ second minute hour day

xt/author/iridium_status.t  view on Meta::CPAN

1997-069D). The intention may have been to swap over the two
satellites but, in any case problems were experienced with with
Iridium 39, which was then removed from the operational
constellation, leaving a gap at Plane 6, Slot 7. No spare was
available to replace it.</p>

<p>In May 2016, Iridium 57 (25273, 1998-019B) began to drift away
slowly from its nominal position (Plane 3, Slot 8) and has
presumably failed. See<a
href="http://www.satobs.org/seesat/May-2016/0069.html"> Iridium
57 looks to have a bad attitude</a>.</p>

<p>In the middle of 2015, Iridium 45 (25104, 1997-082A) which had
been migrating from orbital plane 2 towards orbital plane 3 for
about 14 months, arrived in oribital plane 3. It appears to have
already been in operational use as part of orbital plane 3 for
some months previously, even though it was not in its final
orbital location (Plane 3, Slot 3).</p>

<p>In early December 2014, Space-Track catalogued four items of
debris (40324-40327, 2002-05G to 2002-05K) associated wth the