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@@ -39,8 +39,11 @@ gpsfs, gpsevermore \- GPS time and position service
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.SH DESCRIPTION
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.B Aux/gpsfs
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-reads an NMEA-compatible serial GPS device and provides time and position
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-through a file system, typically in
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+reads an NMEA-compatible serial GPS (Global Positioning System)
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+device and provides time and position
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+through a file system, by default mounted on
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+.B /mnt
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+and implementing
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.BR /mnt/gps .
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.PP
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It implements four files in the
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@@ -55,6 +58,8 @@ and
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The read-only
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.B position
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file contains one line of information in 9 tab-separated fields:
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+.TF "\fImagnetic deviation
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+.PD
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.TP
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.I "fix quality
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0 means position data invalid, 1 means a 2D position is available, 2 means a 3D position is available.
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@@ -88,6 +93,8 @@ in km/h
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The read-only
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.B time
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file contains one line of information in 4 tab-separated fields:
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+.TF "\fIsystem time
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+.PD
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.TP
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.I "gps time
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in
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@@ -127,6 +134,8 @@ The read-only
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file contains information about the current satellite constellation. It consists
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of one line of general information, followed by zero or more lines, one for each satellite in use.
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The first line contains two fields:
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+.TF "\fIsatellites in view
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+.PD
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.TP
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.I "fix quality
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same as in the
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@@ -137,6 +146,8 @@ file.
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number of satellites above the horizon
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.PP
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Subsequent lines have four fields:
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+.TF "\fIelevation
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+.PD
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.TP
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.I prn
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satellite ID
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@@ -183,7 +194,7 @@ The
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.B \-m
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flag specifies a mount mount other than
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.BR /mnt .
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-.PP
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+.SS Evermore
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.B Aux/gpsevermore
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is used to configure GPSs using an Evermore chipset.
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.PP
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