Current version: LST 2.0
type: Windows .NET executable
original version 1: 2017 (Windows console version)
date current version 2.0: 29 October 2017 (.NET version)
SOLLONG 3.1 - This program is of interest to
meteor observers. SOLLONG 3.1 is a program that calculates the J2000 Solar Longitude for
a given date and time. It also calculates the Julian Day and estimates
Delta T. It employs the full VSOP87 theory and includes a correction
from the mean dynamical equinox to FK5. Results can be saved to a .txt
file
Download
Current version: SOLLONG 3.1
type: Windows .NET executable
original version 1: 2016 (Windows console version)
date current version 3.1: 29 October 2017 (.NET version)
IOD Entry 1.2 - This program is of interest to satellite observers. IOD Entry is a program
that creates satellite observation data lines in IOD format. IOD
is the format used by international amateur satellite observers to communicate positional measurements on satellites. The resulting IOD
formatted data lines can be saved to a .txt file and saved to an incremental archive file.
Download
Current version: IOD Entry 1.2
type: Windows .NET executable
original version 1: 1 November 2017
date current version 1.2: 19 June 2020
EasyPPAS 1.0 - This program is of interest to satellite observers. EasyPPAS 1.0 is a program
that creates satellite photometric data lines in PPAS format. PPAS (Photometric Periods of Artificial Satellites) is the format used by international amateur satellite observers to communicate brightness variation measurements on satellites. The resulting PPAS
formatted data lines can be saved to a .txt file and saved to an incremental archive file.
Download
Current version: EasyPPAS 1.0
type: Windows .NET executable
original version 1: 8 May 2019
date current version 1.0: 8 May 2019
SkyTrack 2.9 - This program is of interest to satellite observers. SkyTrack is a program that, from a TLE, for a user-defined time window and in user defined time steps calculates the groundtrack (sub-satellite points) of the satellite, it's altitude above Earth, its range to the observer, its position in the sky from a user-defined observing location (both as RA/DEC and Azimuth/Elevation), whether it is sun-illuminated or not, and as optional output also a Doppler-corrected frequency and/or ECEF X,Y Z coordinates and velocity vector. Output is numerical, not graphical, and can be saved to a .txt file. However: as of version 2.5, there is an option to generate a .kml file for visualization in Google Earth. Version 2.6 corrects a bug where for sites with altitudes well above MSL, a wrong AZ/ELEV and RA/DEC was given. Version 2.7 corrects a bug where site latitudes/longitudes were incorrectly written away for southern and western hemisphere sites. Version 2.9 adds solar altitudes at the observing site, and the option to correct the calculated sky elevations for atmospheric refraction.
Download
Current version: SkyTrack 2.9
type: Windows .NET executable (64-bits)
original version 1: 27 January 2019
date current version 2.9: 11 March 2021
TLE from Proxy 1.0 - This program is of interest to satellite observers. TLE from Proxy is a program
that estimates a TLE for a new launch, based on a proxy TLE from a previous similar launch. Inputs are a TLE from a previous similar launch, the date and time of that launch, and the date and time of the new launch. The resulting TLE can be saved to a .txt file.
Download
Current version: TLE from Proxy 1.0
type: Windows .NET executable
original version 1: 11 November 2017
date current version 1.0: 11 November 2017
TLExtract 3.7 - This program is of interest to satellite observers. TLExtract is a program
to extract TLE's from a larger TLE file, based on a custom-set selection criterion (for example, you can set it to select all TLE with perigee above a certain height; or all TLE with "USA" in the object name; etcetera). Version 3.0 has drastically improved performance when operating on large files, and solved a problem with hidden line carriers. Version 3.7 added several new selection options (e.g. RAAN and orbit type) and option to copy output into the input window for further selection.
Download
Current version: TLExtract 3.7
type: Windows .NET executable
original version 1.0: 15 February 2018
date current version 3.7: 11 April 2018
Plane X 1.0 - This program is of interest to satellite observers. Plane X is a program
to calculate the two moments in the day that the orbital plane of a satellite crosses exactly over a given location on Earth.
Download
Current version: Plane X 1.0
type: Windows .NET executable
original version 1.0: 6 April 2018
date current version 1.0: 6 April 2018
PlaneSearch 1.0 - This program is of interest to satellite observers. PlaneSearch is a program to help conduct a planar search for a lost object. It creates a large number of clones of an original input orbit, at 5-degree intervals in Mean Anomaly. This effectively creates clones spreading over the full orbital plane. Loaded into predictive planetarium software like Heavensat, it shows you where the orbital plane is located in the sky, and how it moves over the sky in time, aiding you in a survey of the orbital plane.
Download
Current version: PlaneSearch 1.0
type: Windows .NET executable
original version 1.0: 20 November 2018
date current version 1.0: 20 November 2018
Doppler 1.0 - This program is of interest to satellite observers. Doppler is a program to calculate the Doppler shift of a radio signal emitted by a satellite, for a given receiving location.
Download
Current version: Doppler 1.0
type: Windows .NET executable (64 bits)
original version 1.0: 5 Februari 2019
date current version 1.0: 5 Februari 2019
XTerminator 1.0 - This program calculates the geographic position of the terminator (the day-/night line) on Earth for a given date and time.
Download
Current version: XTerminator 1.0
type: Windows .NET executable
original version 1.0: 3 June 2020
date current version 1.0: 3 June 2020
Hohmann transfer 1.1 - This program is of interest to satellite observers. Hohmann transfer is a program
to calculate the delta V needed, and the amount of fuel needed, for a Hohmann transfer to a higher orbit.
Download
Current version: Hohmann transfer 1.1
type: Windows .NET executable
original version 1.0: 10 April 2018
date current version 1.1: 12 April 2018
D-orbit 1.0 - This program is of interest to satellite observers. D-orbit is a program
to calculate the delta V and the amount of fuel needed to deorbit a spacecraft.
Download
Current version: D-orbit 1.0
type: Windows .NET executable
original version 1.0: 12 April 2018
date current version 1.0: 12 April 2018
HtoSize - H to Size gives an estimate of the size of an asteroid based on its H parameter.
Download
Current version: HtoSize 2.0
type: Windows .NET executable
original version 1: 2005 (Windows console version)
date current version 2.0: 2018
METORB 10 - METORB is an Excel spreadsheet to calculate meteor orbits from
supplied radiant and speed information. In order to work with it, you
will also need Planeph
or similar software to calculate heliocentric X Y Z positions and
speeds of the Earth.
Download
Current version: METORB 10
type: Excel spreadsheet
original version 1: 2004
date current version 10: October 2017
Zenitat 3 - Zenitat 3 is an Excel spreadsheet that calculates the zenit
attraction of a meteor from a given geocentric velocity and true
radiant altitude. Useful for calculating the apparent radiant of slow
meteor streams with the radiant low in the sky.
Download
Current version: 3
type: Excel spreadsheet
original version 1: 2004
date current version: 2004
D' Crit - D' Crit is an Excel spreadsheet that compares two sets of
heliocentric orbital elements and calculates Drummond's D' criterion, a measure for the
similarity of the orbits.
Download
Current version: 1.0
type: Excel spreadsheet
original version 1: 2001
date current version: 2001
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