Satellites - Tracking Information
|
|
This table shows information about the satllites that are currently
being tracked. Each row in the table shows one of 12 Channels
in the GPS receiver, each of which can be directed to track the
signals from a single satellite. When a channel is tracking a
satellite, the table will show specific information about that
satellite, as well as some basic measurement values.
This information is updated approximately every five seconds.
-
PRN:
The numeric identifier of the satellite tracked on the channel. To
sort by the satellite PRN number click on PRN at the top of the column.
-
Elv:
The elevation of the satellite, in degrees above the horizon. To sort
by elevation click on Elv at the top of the column.
-
Azm:
The azimuth (direction) of the satellite, in degrees clockwise from True
North. To sort by azimuth click on Azm at the top of the column.
-
L1 SNR:
-
L2 SNR:
The Signal to Noise Ratio (SNR) of the satellite on either the
L1 or L2 frequency. Scaled to a 1 Hertz bandwidth (C/N0 - "C
to N-zero".)
To sort by the SNR, click on the column title.
-
IODE:
Issue of Data Ephemeris - The numeric identifier for the latest
satellite data collected from this satellite.
-
URA:
User Range Accuracy - The satellite's estimate of the accuracy
of its ranging signals, in meters.
-
Health:
Health status as provided in the satellite's most recent data. When
Healthy is displayed in this column it indicates that a value of zero,
or perfect health, was received. A non-zero values indicate that the
satellite has been marked as unhealthy. See the GPS ICD-200 for
information about unhealthy satellite codes.
-
Chan:
Channel number. Each channel is capable of tracking the L1
and L2 signsls from a single satellite.
To sort by the channel number click on Chan at the top of the
column.
Top