Differences

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

--- en:documentation:internet [2009/01/21 17:12] – marc_fokker
+++ en:documentation:internet [2017/01/13 22:03] (current) – [Asteroids] pch
@@ Line 1: / Line 1: @@
 ====== Internet ======
+\\ \\ \\
-FIXME The pictures internet_proxy.jpg, internet_orbit.jpg are obsolete and should be replaced. It doesn't affect the usabillity of this document.
+===== Proxy =====
+{{  en:documentation:internet_proxy.jpg?300|}}
+From the menu: **Setup -> Internet -> Proxy**
+\\ \\
-===== Proxy =====
-{{  en:documentation:internet_proxy.jpg|}}
   * **HTTP Proxy**
-If you are connected to Internet through a proxy, CdC needs its parameters to work.\\
+If you are connected to Internet through a proxy, SkyCharts needs its parameters to work.\\
-The parameters are :
+The parameters are:
     * **Proxy host** IP address or hostname of the proxy.
     * **Port** port number used to communicate with the proxy.
@@ Line 22: / Line 20: @@
 You can skip to push the download button every time you want to retrieve data from online resources. To do so, you need to uncheck the checkbox "Ask confirmation before any Internet connection" at the bottom of this tab.
 \\ \\ \\
 ===== Orbital Elements =====
 {{  en:documentation:internet_orbit.jpg|}}
+From the menu: **Setup -> Internet -> Orbital Elements**
+\\ \\
 Here the MPC URLs are specified that SkyChart can use to download the orbital elements of comets and asteroids.
 ==== Comets ====
-The upper input area contains the URLs for comets, you can choose your site (and protocol) to download from by clicking one of the four buttons:
+The upper input area contains the URLs for comets, you can choose the site and protocol to download from by a click on one of the four buttons:
-  * **astro.cz HTTP** comet data by the **[[http://www.astro.cz/mpcorb/COMET.DAT|HTTP]]** protocol
+  * **MPC Http** comet data from **[[http://www.minorplanetcenter.net|www.minorplanetcenter.net]]** by the HTTP protocol
-  * **MPC Ftp** comet data from **[[ftp://cfa-ftp.harvard.edu/pub/MPCORB/COMET.DAT|cfa-ftp.harvard.edu]]** by the FTP protocol
-  * **MPC Http** same as above, only **[[http://cfa-www.harvard.edu/iau/Ephemerides/Comets/Soft00Cmt.txt|HTTP protocol]]**
   * **Default** sets the URL to the same as MPC HTTP.
+No more mirror sites are available right now.
@@ Line 58: / Line 44: @@
 The lower input area shows the MCP URLs that are used for asteroids, you can choose the source for the orbital elements by clicking one of the six buttons:
-  * **MPCORB > 70MB!** for full file (more than 300.000 asteroids, FTP protocol mandatory)
+  * **First 5000** the first 5000 numbered asteroids updated daily (file downloaded from CdC Site)
-  * **First 5000** for a choice of 5000 asteroids (file downloaded from CdC Site)
+  * **First 5000 + NEO + TNO** the same as above with the addition of NEO, TNO and unusual objects.
-  * **Bright + NEO + TNO** For three MPC lists of asteroids (bright, unusual and distant)
+  * **MPCORB > 70MB!** for full file (more than 700.000 asteroids), beware this can slow down the chart display.
-  * **Default** is same as **First 5000 + NEO + TNO**.
+  * **Default** is same as **First 5000**.
-  * **astro.cz > 70B!** A MPC-mirror situated in the Czech Republic. 300.000 asteroids, by HTTP
-  * **First 5000 + NEO + TNO** 5000 asteroids + the unusual and distant
 \\ \\
 ===== Online DSS pictures =====
 {{  en:documentation:internet_dss.jpg|}}
+From the menu: **Setup -> Internet -> Online DSS**
+\\ \\
 Here the DSS URLs are specified that you can use to download FITS formatted pictures.
-Each row in the list has a name and a URL. The name is used as a short identifier for the long URL. The URLs describe where and exactly how to download the pictures from. (see the [[http://archive.eso.org/cms/catalogs-dss|DSS Site]] for details).
+Each row in the list has a name and a URL. The name is used as a short identifier for the long URL. The URLs describe where and exactly how to download the pictures from. (see for example the [[http://archive.eso.org/cms/catalogs-dss|DSS Site]] for details).
 The names are used to select the source of your pictures, make your selection by a click on the {{en:documentation:i81.png|}} icon in object tool bar, or by clicking **Chart -> Get DSS Image**.
 \\ \\
-When you are an experienced user and really know what to do, you can add more rows by editing the [DSS] section in your **cartesduciel.ini** configuration file.
+When you are an experienced user and you know pretty well what to do, you can add more rows with this dialog box. You will not break anything if the syntax is wrong, the worst that can happen is that the program will not be able to retrieve a picture by a faulty URL. \\
-You can built the proper URL-syntax for the website to retrieve the data from. First you need to find out the syntax of the parameters that the website can handle. When you know this, you need to fill the variables for the parameters with the values that SkyCharts can deliver automatically. The next list gives you an overview of the variables as I know them now.
+First you need to find out the syntax and the type of parameters that the website can handle. When you know this, you need to fill the variables for the parameters with the values that automatically will be delivered by Cartes du Ciel-Skychart. \\
+Now, just click an empty line, enter a short name at the left. At the right, enter the complete URL with the proper variables from Cartes du Ciel-Skychart on the right places. \\ \\
+The next list gives you an overview of the variables that Cartes du Ciel-Skychart uses to generate the query URLs.
 ^SkyChart variable^meaning^
 |$RAH|Center coordinates, Right Ascension Hours|
 |$RAM|Center coordinates, Right Ascension Minutes|
 |$RAS|Center coordinates, Right Ascension Seconds|
-|$DED|Center coordinates, Declination Degrees|
+|$DED|Center coordinates, Declination Degrees, North of celestial equator is prefixed with **+**, south prefixed by -|
 |$DEM|Center coordinates, Declination Minutes|
 |$DES|Center coordinates, Declination Seconds|
 |$RAF|Center coordinates, Right Ascension, in decimal degrees of arc|
-|$DEF|Center coordinates, Declination, decimal degrees. North of celestial equator without a sign, south prefixed by **-**|
+|$DEF|Center coordinates, Declination, decimal degrees. North of celestial equator is represented without a sign, south prefixed by **-**|
-|$XSZ|FOV in X direction, seconds of arc, precision 3 digits|
+|$XSZ|FOV in X direction, decimal minutes of arc, precision 3 digits|
-|$YSZ|FOV in Y direction, seconds of arc, precision 3 digits|
+|$YSZ|FOV in Y direction, decimal minutes of arc, precision 3 digits|
-|$FOVX|FOV in X direction, minutes of arc, precision 6 digits|
+|$FOVX|FOV in X direction, decimal degrees of arc, precision 6 digits|
-|$FOVY|FOV in Y direction, minutes of arc, precision 6 digits|
+|$FOVY|FOV in Y direction, decimal degrees of arc, precision 6 digits|
 |$PIXX|Pixels in X direction|
 |$PIXY|Pixels in Y direction|
@@ Line 115: / Line 87: @@
 To read more about the configuration of the usage of DSS, click **[[pictures#DSS_RealSky|here]]**. \\
- \\ \\ \\ \\ \\ \\ \\
+===== Artificial satellites =====
+{{:en:documentation:internet_tle.jpg|}}
+From the menu: **Setup -> Internet -> Artificial satellites**
+Here the URL for the TLE files you want to download using the [[artificial_satellites|Calendar]] **Download TLE** button..
+You can specify TLE files with an extension of .tle or .txt, or a .zip containing one of this files.
+Click one of the button to fill the list with example URL. \\
+You can add other files as you want, take a look at the source web site to get a list of the available files:\\
+http://celestrak.com \\
+http://www.tle.info \\
+Keep the qsmag.zip line as it update the satellite magnitude estimate file.
+Click the Manual button to clear the list and download manually the tle from https://www.space-track.org as in the previous version.