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Py-spktype21
Jul 20, 2023
Supporting module for jplephem to handle data type 21
This module computes positions and velocities of a celestial small body, from a NASA SPICE SPK ephemeris kernel file of data type 21 Extended Modified Difference Arrays. See http//naif.jpl.nasa.gov/pub/naif/toolkit_docs/FORTRAN/req/spk.html
You can get SPK files for many solar system small bodies from HORIZONS system of NASA/JPL. See https//ssd.jpl.nasa.gov/?horizons
This module reads SPK files of data type 21, one of the types of binary SPK file. At the point of Oct. 2018, HORIZONS system provides files of type 21 as binary SPK files by default. You can get type 21 binary SPK file for celestial small bodies through TELNET interface by answering back ‘B’ for ‘SPK file format’. Also you can get type 21 binary SPK file from https//ssd.jpl.nasa.gov/x/spk.html
Checkout these related ports:
- Xworld - Earth as seen from the direction of the sun
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- Xplanet - Draw pictures of the earth textured by an image
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- Xeartk - Small demo for tkgeomap
- Xearth - Set the root window to the image of earth
- Wmsun - Dockapp that displays the rise and set times of the Sun
- Wmspaceweather - DockApp that shows the weather at geosynchronous orbit
- Wmsolar - Dockapp that displays the Solar System viewed from the top
- Wmmoonclock - Displays the phase of the moon, plus orbital data
- Wmjupiter - Dockapp that displays information on Jupiter
- Wmglobe - Neat xearth-like WindowMaker dockapp
- Weather - Utility to provide current weather conditions and forecasts