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#!/usr/bin/python
#
# This script is used to create the initial satellite data repository by
# converting Celestrak TLE files into a satellites.dat and .cat files.
#
# 1. Copy this script into a temp folder
# 2. Create subdirectories ./in/ ./tmp/ and ./out/
# 3. Run the script
# 4. You should have a .cat file for each category as well as a satellites.dat
# file in the ./out/ folder
#
# This script is only used during development and is not needed by end users.
#
import os
import string
import time
import urllib.request
# Satellite groups
groups = {
"amateur" : "Amateur Radio",
"cubesat" : "Cubesat",
"galileo" : "Galileo Nav.",
"glo-ops" : "Glonass Operational",
"gps-ops" : "GPS Operational",
"iridium-NEXT" : "Iridium NEXT",
"molniya" : "Molniya",
"noaa" : "NOAA",
"science" : "Space & Earth Science",
"visual" : "Brightest",
"weather" : "Weather Satellites"
}
# Satellite nicknames
nicknames = {
"4321" : "AO-5",
"6236" : "AO-6",
"7530" : "AO-7",
"10703" : "AO-8",
"14129" : "AO-10",
"14781" : "UO-11",
"16909" : "FO-12",
"20437" : "UO-14",
"20438" : "UO-15",
"20439" : "AO-16",
"20440" : "DO-17",
"20441" : "WO-18",
"20442" : "LO-19",
"20480" : "FO-20",
"21087" : "RS-14",
"21089" : "RS-12/13",
"21575" : "UO-22",
"22077" : "KO-23",
"22654" : "AO-24",
"22825" : "AO-27",
"22826" : "IO-26",
"22828" : "KO-25",
"22829" : "PO-28",
"23439" : "RS-15",
"24278" : "FO-29",
"24305" : "MO-30",
"25396" : "TO-31",
"25397" : "GO-32",
"25509" : "SO-33",
"25520" : "PO-34",
"25544" : "ISS",
"25636" : "SO-35",
"25693" : "UO-36",
"26063" : "OO-38",
"26545" : "SO-41",
"26548" : "MO-46",
"26549" : "SO-42",
"26609" : "AO-40",
"26931" : "NO-44",
"26932" : "NO-45",
"27607" : "SO-50",
"27844" : "CO-55",
"27848" : "CO-57",
"27939" : "RS-22",
"28375" : "AO-51",
"28650" : "VO-52",
"28894" : "XO-53",
"28895" : "CO-58",
"28941" : "CO-56",
"35870" : "SO-67",
"36122" : "HO-68",
"39444" : "AO-73",
"40967" : "AO-85",
"43017" : "AO-91"
}
urlprefix = "https://celestrak.org/NORAD/elements/gp.php?GROUP="
urlsuffix = "&FORMAT=tle"
for group, name in groups.items():
webfile = urlprefix + group + urlsuffix
localfile = "./in/" + group + ".txt"
print("Fetching " + webfile + " => " + localfile)
urllib.request.urlretrieve (webfile, localfile)
time.sleep(30)
### CHK ###
# For each input file
for group, name in groups.items():
print(name+':')
# open TLE file for reading
tlefile = open('./in/'+group+'.txt', 'r')
# create category file
category = "./out/"+group+".cat"
catfile = open(category, 'w')
# first line is the group name
catfile.write(name+'\n')
while 1:
# read three lines at a time; strip trailing whitespaces
line1 = tlefile.readline().strip()
if not line1: break
line2 = tlefile.readline().strip()
line3 = tlefile.readline().strip()
# catalog number; strip leading zeroes
catnum = line2[2:7].lstrip('0')
print(" ... " + catnum)
# add satellite to category
catfile.write(catnum+'\n')
# satellite file
satfile = open('./tmp/'+catnum+'.sat','w')
satfile.write('VERSION=1.1\n')
satfile.write('NAME='+line1+'\n')
if catnum in nicknames:
satfile.write('NICKNAME='+nicknames[catnum]+'\n')
else:
satfile.write('NICKNAME='+line1+'\n')
satfile.write('TLE1='+line2+'\n')
satfile.write('TLE2='+line3+'\n')
satfile.close()
# close TLE and CAT files
tlefile.close()
catfile.close()
# now package the .sat files into one .dat file
datfile = open('./out/satellites.dat', 'w')
for file in os.listdir("./tmp/"):
# open .sat file
satfile = open("./tmp/"+file, "r")
# Create fake config group of catnum
catnum = file.partition(".")[0]
datfile.write("\n["+catnum+"]\n")
# read lines from satfile and write them to datfile
text = satfile.readlines()
datfile.writelines(text)
satfile.close();
datfile.close()
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