Differences

This shows you the differences between two versions of the page.

--- en:documentation:solar_system [2014/02/02 10:28] – pch
+++ en:documentation:solar_system [2019/12/28 12:06] (current) – [Ephemeris] pch
@@ Line 7: / Line 7: @@
   * [[solar_system#comet|Comet]]
   * [[solar_system#asteroid|Asteroid]]
-  * [[solar_system#near_earth_objects|Near Earth Objects]]
+NEO's ([[solar_system#near_earth_objects|Near Earth Objects]]) demand a special approach to have them displayed.
 ===== Solar System =====
 {{  en:documentation:solar_system.jpg?300|}}
@@ Line 26: / Line 23: @@
 To give you the best possible precision, the program uses the JPL DExxx ephemeris to compute the planet positions and the nutation. \\
-To limit the download size, the included DE405 file with this software is limited for usage from the years 2000 to 2050.
+To limit the download size, the included DE430 file with this software is limited for usage from the years 2000 to 2050.\\
+If no file is found for the date, it uses plan404 by [[http://www.moshier.net/index.html|Steve Moshier]] that allows for computation from -3000 to +3000 with a precision better than one arc second.
-You can add more files to cover an extended time range or to use other ephemeris. Download the binary files from ftp://ssd.jpl.nasa.gov/pub/eph/planets/Linux or ftp://ssd.jpl.nasa.gov/pub/eph/planets/SunOS.\\
-Copy the linx* or unx* files to the [[directories_and_files|installation folder]] under data\jpleph\ without creating a subdirectory. You must restart the program after adding or removal of files.
+You can add more files to cover an extended time range or to use other ephemeris. Download the binary files from ftp://ssd.jpl.nasa.gov/pub/eph/planets/Linux .\\
+Copy the lnx* or unx* files to the [[directories_and_files|installation folder]] under data\jpleph\ without creating a subdirectory. You must restart the program after adding or removal of files.
 The software tries to load DE430, DE431, DE423, DE421, DE422, DE405, DE406, DE403, DE200 in this order.\\
 The "lnx*" files are used in preference of the "unx*" because they do not require byte swapping.
-If no file is found for the date, it uses plan404 by [[http://www.moshier.net/index.html|Steve Moshier]] that allows for computation from -3000 to +3000 with a precision better than one arc second.
 If DE431 is present the planet calculation can be done between -13000 and +17000.
@@ Line 58: / Line 56: @@
 This feature require an Internet connection and correct setting of the [[internet#proxy|proxy server]] if required.
-You can update the position of Jupiter's Great Red Spot (GRS) in longitude: Click at the icon at the right to open **[[http://jupos.privat.t-online.de/|Jupos page]]** on your browser, where you can find the GRS longitude in the menu at the left. Look at the red dot at the bottom of the graph to get the most recent position of the GRS center. For example it was about 160 in December 2010:\\
+You can update the position of Jupiter's Great Red Spot (GRS) in longitude: Click at the big button **Get the recent GRS measurement from JUPOS project**, this download a file with recent measurement and update the values.\\
+You can also open the **[[http://jupos.privat.t-online.de/|Jupos page]]**, click on **GRS Longitude** in the menu. Then look at the red dot at the bottom of the graph to get the most recent position of the GRS center. For example it was about 160 in December 2010:\\
 {{:en:documentation:jupos_grs.png?250| }}\\