The Kepler Updater
What is the Kepler Updater?
The Kepler Updater allows you to interface with the CelesTrak Web site to download two-line element data. You can also use the automation features of the Kepler Updater to keep your Kepler data current for both the multi-line Kepler data required by real-time tracking programs such as WXtrack and the historic Kepler data required by programs like the HRPT Reader for processing non real-time data.
As far as possible, any setting you already have for the earlier Kepler Manager software will be entered as defaults in the Kepler Updater on its first run.
In the groups list, check the groups you wish to download from CelesTrak. If there's a group missing which you feel is important, please let me know. Data will be saved to a folder of your choice such as C:\Tools\SatSignal\WXtrack\ You can use the [...] button to browse for another directory.
For your own selection of satellite data, enter the NORAD numbers into the My Favourites list. Enter a file name (within the groups folder) where the data should be saved.
The program will update any historic Kepler data you have in
the "historic Kepler data" directory. All files named *.txt will
be checked and updated from either the EUMETSAT Web site if those satellites are
available, or from the CelesTrak Active List otherwise. Note that if the
satellite is not on the Active List, it will not be updated, so data for
e.g. Envisat and FY-1C will not be updated. Enter the path to the Historic
Kepler data, for example: C:\Tools\SatSignal\HRPTreader\keps\updates\.
Starting Historic data
To add new historic data, for each new satellite you need to create a plain text file using Notepad, named e.g. Metop-C.txt, in the Historic directory to "seed" the program into updating the data. The program must contain at least two sets of two-line Kepler entries, although they can be the same entry duplicated as show below. These two entries are needed:
You can get a suitable entry from one of the other group files such as weather.txt.
|V2019.07.28.04||First released version.|
|V2019.07.28.05||Add WXtrack compatibility.|
|V2019.07.29.06||Include SSL libraries in the archive.|
|V2019.07.30.07||Honour user's group selection.|
|V2019.08.29.08||Add Science and Stations groups.|
|V2020.02.23.09||Provide an option to use EUMETSAT data or not.|
|V2020.05.14.10||Revert to HTTP access following CelesTrak changes.|
|V2020.11.20.11||Update for EUMETSAT Web site changes.|
|V2020.12.02.12||Add Resource group.|
|V2021.07.21.13||Handle HTTPS errors when connecting to EUMETSAT site.|
|V2021.08.02.14||Use CURL to overcome HTTPS errors.|
The user of the program is responsible for ensuring the accuracy of any data
produced by the program.
Data downloaded by the program may not be passed onto any third party without the appropriate permissions.
Use of this program in a for-profit environment or by any commercial or industrial organisation, or by a National Institution (e.g. National Weather Service) requires registration. You can register my WXtrack software here.
This program is provided "as is" and without any warranty as to merchantability
or fitness for a particular purpose or any other warranties either expressed or implied. The author will not be liable for data loss, damages, loss of profits
or any other kind of loss while using or misusing this software.
This software may not be used in safety-critical or life-critical systems.
Unfortunately, the Kepler data from CelesTrak (as sent from it
contains inconsistent, out-of-sequence orbit numbers which can confuse software
including my own AVHRR Manager program. To ameliorate this issue, the
program will first get the Kepler
data direct from EUMETSAT for the satellites for which they disseminate
My thanks to Thorsten Miglus (on Twitter)
for drawing my attention to the EUMETSAT Kepler data, and for providing a super
command-script for using this data, and to Dr. T. S. Kelso for discussions about
the famous CelesTrak Web site
and how to best use data from that site without overloading it!