spacecruft
/
galmon
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

[HTML Cleanup] Remove deprecated valign tags and switch to CSS

pull/47/head
Joseph Foulds 2019-11-18 14:38:22 +00:00
parent 9a03706faf
commit 3554a0e032
1 changed files with 22 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
html/index.html
View File

@ -53,6 +53,10 @@
text-align: center;
}
#fields tr {
vertical-align:top;
}
</style>
</head>
<body>
@ -91,24 +95,24 @@
<p>
The meaning of the fields is explained in <a href="https://berthub.eu/articles/posts/gps-gnss-how-do-they-work/">this document</a> and can be summarised as follows:
</p>
<table>
<tr valign="top"><td>sv</td><td>Satellite Vehicle, an identifier for a Galileo satellite. Not the actual name of the satellite, other satellites could take over this number in case of failures</td></tr>
<tr valign="top"><td>iod</td><td>Issue of Data. Satellites periodically get sent updates on their orbit &amp; other details, each update has a new IOD number. It is coincidence that all SVs currently receive the same IOD numbers, this is by no means guaranteed. Currently however, if an SV has a lower IOD, it has not received new updates recently.</td></tr>
<tr valign="top"><td>eph‑age‑m</td><td>Age of ephemeris in minutes. Denotes how old the current set of orbit data is. Could be very old if SV is out of sight (see below). An acceptable limit is 4 hours (240 minutes).</td></tr>
<tr valign="top"><td>latest-disco</td><td>"jump" of the orbit prediction at the latest ephemeris change. Centimeters are good.</td></tr>
<tr valign="top"><td>time-disco</td><td>"jump" of the atomic clock at the latest ephemeris change.</td></tr>
<tr valign="top"><td>sisa</td><td>Signal In Space Accuracy, how well the position of an SV is known.</td></tr>
<tr valign="top"><td>health</td><td>If a satellite considers itself healthy.</td></tr>
<tr valign="top"><td>delta-UTC</td><td>Offset of the GNSS Time to UTC, plus trend</td></tr>
<tr valign="top"><td>delta-GPS</td><td>Offset of the GNSS Time to GPS, plus trend</td></tr>
<tr valign="top"><td>alma-dist</td><td>Distance between precise satellite position and almanac summary position</td></tr>
<tr valign="top"><td>tle-dist</td><td>Distance between precise satellite position and TLE position</td></tr>
<tr valign="top"><td>best-tle</td><td>From TLE database, closest satellite to reported position</td></tr>
<tr valign="top"><td>prres</td><td>Pseudorange residual: measure of how far away the satellite <b>appears</b> to be from where it should be, according to a receiver. Meters.</td></tr>
<tr valign="top"><td>delta-Hz</td><td>Difference between calculated (expected) Doppler shift and measured Doppler shift. Measure of orbit correctness. Hz.</td></tr>
<tr valign="top"><td>elev</td><td>Elevation of an SV over or under my horizon (90 is straight up), calculated by this website</td></tr>
<tr valign="top"><td>db</td><td>A measure of signal to noise ratio (40+ is good)</td></tr>
<tr valign="top"><td>last‑seen‑s</td><td>Time since we've last received from this SV.</td></tr>
<table id="fields">
<tr><td>sv</td><td>Satellite Vehicle, an identifier for a Galileo satellite. Not the actual name of the satellite, other satellites could take over this number in case of failures</td></tr>
<tr><td>iod</td><td>Issue of Data. Satellites periodically get sent updates on their orbit &amp; other details, each update has a new IOD number. It is coincidence that all SVs currently receive the same IOD numbers, this is by no means guaranteed. Currently however, if an SV has a lower IOD, it has not received new updates recently.</td></tr>
<tr><td>eph‑age‑m</td><td>Age of ephemeris in minutes. Denotes how old the current set of orbit data is. Could be very old if SV is out of sight (see below). An acceptable limit is 4 hours (240 minutes).</td></tr>
<tr><td>latest-disco</td><td>"jump" of the orbit prediction at the latest ephemeris change. Centimeters are good.</td></tr>
<tr><td>time-disco</td><td>"jump" of the atomic clock at the latest ephemeris change.</td></tr>
<tr><td>sisa</td><td>Signal In Space Accuracy, how well the position of an SV is known.</td></tr>
<tr><td>health</td><td>If a satellite considers itself healthy.</td></tr>
<tr><td>delta-UTC</td><td>Offset of the GNSS Time to UTC, plus trend</td></tr>
<tr><td>delta-GPS</td><td>Offset of the GNSS Time to GPS, plus trend</td></tr>
<tr><td>alma-dist</td><td>Distance between precise satellite position and almanac summary position</td></tr>
<tr><td>tle-dist</td><td>Distance between precise satellite position and TLE position</td></tr>
<tr><td>best-tle</td><td>From TLE database, closest satellite to reported position</td></tr>
<tr><td>prres</td><td>Pseudorange residual: measure of how far away the satellite <b>appears</b> to be from where it should be, according to a receiver. Meters.</td></tr>
<tr><td>delta-Hz</td><td>Difference between calculated (expected) Doppler shift and measured Doppler shift. Measure of orbit correctness. Hz.</td></tr>
<tr><td>elev</td><td>Elevation of an SV over or under my horizon (90 is straight up), calculated by this website</td></tr>
<tr><td>db</td><td>A measure of signal to noise ratio (40+ is good)</td></tr>
<tr><td>last‑seen‑s</td><td>Time since we've last received from this SV.</td></tr>
</table>
<p>
The official Galileo constellation status can be found on the <a href="https://www.gsc-europa.eu/system-status/Constellation-Information">European GNSS Service Centre page</a>, which also lists "NAGUs", <a href="https://www.gsc-europa.eu/system-status/user-notifications">notifications about outages or changes</a>.