X-Git-Url: http://dxcluster.net/gitweb/gitweb.cgi?a=blobdiff_plain;f=perl%2FSun.pm;h=6469df8c135dab130712487f9a4644438ed7bec8;hb=b9dffeff7239952814342dad19db3a51def6fab7;hp=13f7d20cdc1bc7cb60cca01cae1466bfd20bf144;hpb=2b58ccdf81685a1167a43c38705a0d84b9d8d661;p=spider.git diff --git a/perl/Sun.pm b/perl/Sun.pm index 13f7d20c..6469df8c 100644 --- a/perl/Sun.pm +++ b/perl/Sun.pm @@ -1,4 +1,4 @@ -#!/usr/bin/perl -w +#/usr/bin/perl -w # # This module was written by Steve Franke K9AN. # November, 1999. @@ -18,10 +18,14 @@ # # $Id$ # +# 2005/02/25 add calculation of civil dawn and dusk, defined to be times +# when solar zenith angle is 96 degrees. +# 2001/12/16 Fixed Julian_Date_of_Epoch and now I actually use it... +# 2001/09/15 some changes to take care of cases where the object +# doesn't rise or set on a given day... package Sun; -use POSIX; require Exporter; @ISA = qw(Exporter); @@ -29,12 +33,6 @@ require Exporter; use strict; -use vars qw($VERSION $BRANCH); -$VERSION = sprintf( "%d.%03d", q$Revision$ =~ /(\d+)\.(\d+)/ ); -$BRANCH = sprintf( "%d.%03d", q$Revision$ =~ /\d+\.\d+\.(\d+)\.(\d+)/ ) || 0; -$main::build += $VERSION; -$main::branch += $BRANCH; - use vars qw($pi $d2r $r2d); $pi = 3.141592653589; @@ -45,6 +43,9 @@ use vars qw(%keps); use Keps; use DXVars; use DXUtil; +use DXDebug; + +use POSIX qw(:math_h); # reload the keps data sub load @@ -74,13 +75,18 @@ sub Julian_Day sub Julian_Date_of_Epoch { my $epoch=shift; - my $year=int($epoch*1e-3); - $year=$year+2000 if ($year < 57); - $year=$year+1900 if ($year >= 57); - my $day=$epoch-$year*1e3; + my $year=int($epoch/1000); + my $day=$epoch-$year*1000; + if ($year < 57 ) { + $year=$year+2000; + } + else { + $year=$year+1900; + } my $Julian_Date_of_Epoch=Julian_Date_of_Year($year)+$day; return $Julian_Date_of_Epoch; } + sub Julian_Date_of_Year { my $year=shift; @@ -159,10 +165,13 @@ sub rise_set my $lat = shift; my $lon = shift; my $sun0_moon1=shift; # 0 for sun, 1 for moon, 2 for venus... + my ($alpha1,$delta1,$alpha2,$delta2,$alpha3,$delta3); + my ($aznow,$hnow,$alphanow,$deltanow,$distance,$distancenow); + my ($h0,$H); + my ($risetime,$settime); + my ($dawntime,$dusktime); - my ($alpha1,$alpha2,$alpha3,$delta1,$delta2,$delta3); - my ($m0,$m1,$m2,$theta,$alpha,$delta,$H,$az,$h,$h0,$aznow,$hnow,$corr); - my ($i,$arg,$argtest,$H0,$alphanow,$deltanow,$distance,$distancenow); + my ($ifrac,$ifracnow); my $julianday=Julian_Day($year,$month,$day); my $tt1 = ($julianday-1-2451545)/36525.; @@ -183,36 +192,74 @@ sub rise_set ($alpha2, $delta2)=get_sun_alpha_delta($tt2); ($alpha3, $delta3)=get_sun_alpha_delta($tt3); ($alphanow, $deltanow)=get_sun_alpha_delta($ttnow); - $h0=-0.8333; $H=$thetanow-$lon-$alphanow; $H=reduce_angle_to_360($H); ($aznow,$hnow)=get_az_el($H,$deltanow,$lat); $hnow=$hnow + 1.02/(tandeg($hnow+10.3/($hnow+5.11)))/60; + $h0=-0.8333; # this is for sun rise and sun set + ($risetime,$settime)= + do_rise_set_calculations($h0,$theta0,$lat,$lon,$alpha1,$delta1, + $alpha2,$delta2,$alpha3,$delta3); + $h0=-6.0; # this is for civil dawn and dusk + ($dawntime,$dusktime)= + do_rise_set_calculations($h0,$theta0,$lat,$lon,$alpha1,$delta1, + $alpha2,$delta2,$alpha3,$delta3); + $dawntime = "------" if( $dawntime eq "NoRise" ); + $dusktime = "------" if( $dusktime eq "NoSet " ); + + return ( + sprintf("%s", $dawntime), sprintf("%s",$risetime), + sprintf("%s", $settime), sprintf("%s",$dusktime), + $aznow+180,$hnow + ); } if ( $sun0_moon1 == 1 ) { - ($alpha1, $delta1, $distance)=get_moon_alpha_delta($tt1); - ($alpha2, $delta2, $distance)=get_moon_alpha_delta($tt2); - ($alpha3, $delta3, $distance)=get_moon_alpha_delta($tt3); - ($alphanow, $deltanow, $distancenow)=get_moon_alpha_delta($ttnow); - $h0=0.7275*$r2d*asin(6378.14/$distancenow)-34./60.; + ($alpha1, $delta1, $distance, $ifrac)=get_moon_alpha_delta($tt1); + ($alpha2, $delta2, $distance, $ifrac)=get_moon_alpha_delta($tt2); + ($alpha3, $delta3, $distance, $ifrac)=get_moon_alpha_delta($tt3); + ($alphanow, $deltanow, $distancenow, $ifracnow)=get_moon_alpha_delta($ttnow); + $h0=0.7275*$r2d*asin(6378.14/$distancenow)-34.0/60.; $H=$thetanow-$lon-$alphanow; $H=reduce_angle_to_360($H); ($aznow,$hnow)=get_az_el($H,$deltanow,$lat); $hnow=$hnow-$r2d*asin(sin(6378.14/$distancenow)*cosdeg($hnow))+ 1.02/(tandeg($hnow+10.3/($hnow+5.11)))/60; + ($risetime,$settime)= + do_rise_set_calculations($h0,$theta0,$lat,$lon,$alpha1,$delta1, + $alpha2,$delta2,$alpha3,$delta3); + return (sprintf("%s", $risetime), sprintf("%s",$settime), + $aznow+180,$hnow, -40*log10($distance/385000), $ifracnow ); + } - $arg = (sindeg($h0)-sindeg($lat)*sindeg($delta2))/(cosdeg($lat)*cosdeg($delta2)); - $argtest = tandeg($lat)*tandeg($delta2); +} - if ( $argtest < -1. ) { - return sprintf("Doesn't rise."); - } - if ( $argtest > 1. ) { - return sprintf("Doesn't set."); - } +sub do_rise_set_calculations +{ + my $norise = 0; + my $noset = 0; + my ($risehr,$risemin,$risetime,$sethr,$setmin,$settime); + my ($m0,$m1,$m2,$theta,$alpha,$delta,$H,$az,$h,$corr); + my ($i,$arg,$argtest,$H0); + + my $h0=shift; + my $theta0=shift; + my $lat=shift; + my $lon=shift; + my $alpha1=shift; + my $delta1=shift; + my $alpha2=shift; + my $delta2=shift; + my $alpha3=shift; + my $delta3=shift; + + $arg = (sindeg($h0)-sindeg($lat)*sindeg($delta2))/(cosdeg($lat)*cosdeg($delta2)); + if ( abs($arg) > 1. ) { # either up all day or down all day + $norise = 1; # leave it to the user to examine + $noset = 1; # the elevation angle (or look outside!) + } # to figure out which. $H0 = acos($arg)*$r2d; my $aa=$alpha2-$alpha1; @@ -245,67 +292,86 @@ sub rise_set $corr=-$H/360; $m0=$m0+$corr; $m0=$m0+1 if( $m0 < 0 ); - $m0=$m0-1 if( $m0 > 1 ); + $m0=$m0-1 if( $m0 >= 1 ); } - $m1 = $m0 - $H0/360.; - $m1=$m1+1 if( $m1 < 0 ); - $m1=$m1-1 if( $m1 > 1 ); - for ($i=1; $i<=2; $i++) { - $theta = $theta0+360.985647*$m1; - $alpha=$alpha2+$m1*($aa+$ba+$m1*$ca)/2; - $delta=$delta2+$m1*($ad+$bd+$m1*$cd)/2; - $H=$theta-$lon-$alpha; - $H=reduce_angle_to_360($H); - ($az,$h)=get_az_el($H,$delta,$lat); - $corr=($h-$h0)/(360*(cosdeg($delta)*cosdeg($lat)*sindeg($H))); - $m1=$m1+$corr; + + if( !$norise ){ + $m1 = $m0 - $H0/360.; $m1=$m1+1 if( $m1 < 0 ); $m1=$m1-1 if( $m1 > 1 ); + for ($i=1; $i<=2; $i++) { + $theta = $theta0+360.985647*$m1; + $alpha=$alpha2+$m1*($aa+$ba+$m1*$ca)/2; + $delta=$delta2+$m1*($ad+$bd+$m1*$cd)/2; + $H=$theta-$lon-$alpha; + $H=reduce_angle_to_360($H); + ($az,$h)=get_az_el($H,$delta,$lat); + $corr=($h-$h0)/(360*(cosdeg($delta)*cosdeg($lat)*sindeg($H))); + $m1=$m1+$corr; +# $norise=1 if( $m1 < 0 || $m1 > 1); + $m1=$m1-1 if( $m1 >= 1); + $m1=$m1+1 if( $m1 < 0); + } } - $m2 = $m0 + $H0/360.; - $m2=$m2+1 if( $m2 < 0 ); - $m2=$m2-1 if( $m2 > 1 ); - for ($i=1; $i<=2; $i++) { - $theta = $theta0+360.985647*$m2; - $alpha=$alpha2+$m2*($aa+$ba+$m2*$ca)/2; - $delta=$delta2+$m2*($ad+$bd+$m2*$cd)/2; - $H=$theta-$lon-$alpha; - $H=reduce_angle_to_360($H); - ($az,$h)=get_az_el($H,$delta,$lat); - $corr=($h-$h0)/(360*(cosdeg($delta)*cosdeg($lat)*sindeg($H))); - $m2 = $m2 + $corr; - $m2=$m2+1 if( $m2 < 0 ); - $m2=$m2-1 if( $m2 > 1 ); - } - my ($risehr,$risemin,$sethr,$setmin); - $risehr=int($m1*24); - $risemin=($m1*24-int($m1*24))*60+0.5; - if ( $risemin >= 60 ) { - $risemin=$risemin-60; - $risehr=$risehr+1; - } - $sethr=int($m2*24); - $setmin=($m2*24-int($m2*24))*60+0.5; - if ( $setmin >= 60 ) { - $setmin=$setmin-60; - $sethr=$sethr+1; + if( !$norise ) { + $risehr=int($m1*24); + $risemin=($m1*24-int($m1*24))*60+0.5; + if ( $risemin >= 60 ) { + $risemin=$risemin-60; + $risehr=$risehr+1; + } + $risehr=0 if($risehr==24); + $risetime=sprintf("%02d:%02dZ",$risehr,$risemin); + } else { + $risetime="NoRise"; } - if ( $sun0_moon1 == 0 ) { - return (sprintf("%02d:%02dZ", $risehr,$risemin), sprintf("%02d:%02dZ",$sethr,$setmin),$aznow+180,$hnow); - } - if ( $sun0_moon1 == 1 ) { - return (sprintf("%02d:%02dZ", $risehr,$risemin), sprintf("%02d:%02dZ",$sethr,$setmin), - $aznow+180,$hnow, -40*log10($distance/385000) ); + if( !$noset ){ + $m2 = $m0 + $H0/360.; + $m2=$m2+1 if( $m2 < 0 ); + $m2=$m2-1 if( $m2 >= 1 ); + for ($i=1; $i<=2; $i++) { + $theta = $theta0+360.985647*$m2; + $alpha=$alpha2+$m2*($aa+$ba+$m2*$ca)/2; + $delta=$delta2+$m2*($ad+$bd+$m2*$cd)/2; + $H=$theta-$lon-$alpha; + $H=reduce_angle_to_360($H); + ($az,$h)=get_az_el($H,$delta,$lat); + $corr=($h-$h0)/(360*(cosdeg($delta)*cosdeg($lat)*sindeg($H))); + $m2 = $m2 + $corr; +# $noset=1 if( $m2 < 0 || $m2 > 1); + $m2=$m2-1 if( $m2 >= 1); + $m2=$m2+1 if( $m2 < 0); + } } + + if( !$noset ) { + $sethr=int($m2*24); + $setmin=($m2*24-int($m2*24))*60+0.5; + if ( $setmin >= 60 ) { + $setmin=$setmin-60; + $sethr=$sethr+1; + } + $sethr=0 if($sethr==24); + $settime=sprintf("%02d:%02dZ",$sethr,$setmin); + } else { + $settime="NoSet "; + } + return $risetime,$settime; } + + + sub get_moon_alpha_delta { # # Calculate the moon's right ascension and declination # + # As of October 2001, also calculate the illuminated fraction of the + # moon's disk... (why not?) + # my $tt=shift; my $Lp=218.3164477+481267.88123421*$tt- @@ -525,7 +591,20 @@ sub get_moon_alpha_delta my $delta=asin(cosdeg($beta)*sindeg($epsilon)*sindeg($lambda)+sindeg($beta)*cosdeg($epsilon))*$r2d; $delta = reduce_angle_to_360($delta); - return ($alpha,$delta,$distance); +# $phase will be the "moon phase angle" from p. 346 of Meeus' book... + my $phase=180.0 - $D - 6.289 *sindeg($Mp) + + 2.100 *sindeg($M) + - 1.274 *sindeg(2.*$D - $Mp) + - 0.658 *sindeg(2.*$D) + - 0.214 *sindeg(2.*$Mp) + - 0.110 *sindeg($D); + +# $illum_frac is the fraction of the disk that is illuminated, and will be +# zero at new moon and 1.0 at full moon. + + my $illum_frac = (1.0 + cosdeg( $phase ))/2.; + + return ($alpha,$delta,$distance,$illum_frac); } sub get_sun_alpha_delta @@ -611,14 +690,7 @@ sub get_satellite_pos my $epoch = $sat_ref ->{epoch}; #printf("epoch = %10.2f\n",$epoch); - my $epoch_year=int($epoch/1000); - my $epoch_day=$epoch-int(1000*$epoch_year); -#printf("epoch_year = %10.2f\n",$epoch_year); -#printf("epoch_day = %17.12f\n",$epoch_day); - my $ep_year=$epoch_year+2000 if ($epoch_year < 57); - $ep_year=$epoch_year+1900 if ($epoch_year >= 57); - my $jt_epoch=Julian_Date_of_Year($ep_year); - $jt_epoch=$jt_epoch+$epoch_day; + my $jt_epoch=Julian_Date_of_Epoch($epoch); #printf("JT for epoch = %17.12f\n",$jt_epoch); my $tsince=($jtime-$jt_epoch)*24*60; #printf("tsince (min) = %17.12f\n",$tsince);