From 259196e2ece002ff63a0da1831a90e6c0b74ea7f Mon Sep 17 00:00:00 2001 From: "Gary E. Miller" Date: Fri, 22 Mar 2019 20:17:48 -0700 Subject: Split epe into eph and sep. Try to do it with forward and backward compatibility, which is challenging with current miscojson. Sometimes epe was used to 2D estimated erro. Sometimes for 3D error. So make it explicit eph is 2D, and sep is 3D. --- man/gpsd_json.xml | 154 +++++++++++++++++++++++++++++++++++------------------- 1 file changed, 100 insertions(+), 54 deletions(-) (limited to 'man') diff --git a/man/gpsd_json.xml b/man/gpsd_json.xml index 1c868b61..98fcdc96 100644 --- a/man/gpsd_json.xml +++ b/man/gpsd_json.xml @@ -9,7 +9,7 @@ SPDX-License-Identifier: BSD-2-clause ]> -17 Jun 2018 +23 Mar 2019 gpsd_json 5 @@ -135,98 +135,134 @@ Others may be reported or not depending on the fix quality. is not 2 or 3. - ept + alt No numeric - Estimated timestamp error (%f, seconds, 95% confidence). - Present if time is present. + Altitude in meters. Present if mode is 3. - lat + climb No numeric - Latitude in degrees: +/- signifies North/South. Present - when mode is 2 or 3. + Climb (positive) or sink (negative) rate, meters per + second. - lon + epc No numeric - Longitude in degrees: +/- signifies East/West. Present - when mode is 2 or 3. + Estimated climb error in meters per second. Present + if consecutive 3D fixes. + Assumed to be 95% confidence, but many GPS do not specify. + - alt + epd No numeric - Altitude in meters. Present if mode is 3. + Estimated track (direction) error in degrees. Present if + sonsecutive 2D fixes. + Assumed to be 95% confidence, but many GPS do not specify. + + + + eph + No + numeric + Estimated horizontal Position (2D) Error in meters. + Also known as Estimated Position Error (epe). Present + if mode is 2D or 3D and DOPs can be calculated from the satellite + view. Assumed to be 95% confidence, but many GPS do not specify. + + + + ept + No + numeric + Estimated timestamp error (%f, seconds, 95% confidence). + Present if time is present. + + + epv + No + numeric + Estimated vertical error in meters. Present + if mode is 3 and DOPs can be calculated from the satellite + view. Assumed to be 95% confidence, but many GPS do not specify. + epx No numeric - Longitude error estimate in meters, 95% confidence. Present - if mode is 2 or 3 and DOPs can be calculated from the satellite - view. + Longitude error estimate in meters. Present + if mode is 2D or 3D and DOPs can be calculated from the satellite + view. Assumed to be 95% confidence, but many GPS do not specify. + epy No numeric - Latitude error estimate in meters, 95% confidence. Present + Latitude error estimate in meters. Present if mode is 2 or 3 and DOPs can be calculated from the satellite - view. + view. Assumed to be 95% confidence, but many GPS do not specify. + epv No numeric - Estimated vertical error in meters, 95% confidence. Present + Estimated vertical error in meters. Present if mode is 3 and DOPs can be calculated from the satellite - view. + view. Assumed to be 95% confidence, but many GPS do not specify. + - track + eps No numeric - Course over ground, degrees from true north. + Estimated speed error in meters per second. Present + for consecutive 2D or 3D fixes. + Assumed to be 95% confidence, but many GPS do not specify. + - magtrack + lat No numeric - Course over ground, degrees magnetic. + Latitude in degrees: +/- signifies North/South. Present + when mode is 2 or 3. - speed - No - numeric - Speed over ground, meters per second. + leapseconds + integer + Current leap seconds. - climb + lon No numeric - Climb (positive) or sink (negative) rate, meters per - second. + Longitude in degrees: +/- signifies East/West. Present + when mode is 2 or 3. - epd + track No numeric - Direction error estimate in degrees, 95% confidence. + Course over ground, degrees from true north. - eps + magtrack No numeric - Speed error estinmate in meters/sec, 95% confidence. + Course over ground, degrees magnetic. - epc + speed No numeric - Climb/sink error estimate in meters/sec, 95% confidence. + Speed over ground, meters per second. ecefx @@ -276,6 +312,15 @@ Others may be reported or not depending on the fix quality. numeric ECEF velocity error in meters/second. + + sep + No + numeric + Estimated Spherical (3D) Position Error in meters. + Present if mode is 3D and DOPs can be calculated from the satellite + view. Assumed to be 95% confidence, but many GPS do not specify. + + @@ -335,26 +380,27 @@ yet, only the "class" field will reliably be present. fractional part of up to .001sec precision. - xdop + gdop No numeric - Longitudinal dilution of precision, a dimensionless - factor which should be multiplied by a base UERE to get an - error estimate. + Geometric (hyperspherical) dilution of precision, a + combination of PDOP and TDOP. A dimensionless factor which + should be multiplied by a base UERE + to get an error estimate. - ydop + hdop No numeric - Latitudinal dilution of precision, a dimensionless - factor which should be multiplied by a base UERE to get an - error estimate. + Horizontal dilution of precision, a dimensionless + factor which should be multiplied by a base UERE to get a + circular error estimate. - vdop + pdop No numeric - Altitude dilution of precision, a dimensionless + Position (spherical/3D) dilution of precision, a dimensionless factor which should be multiplied by a base UERE to get an error estimate. @@ -367,26 +413,26 @@ yet, only the "class" field will reliably be present. error estimate. - hdop + vdop No numeric - Horizontal dilution of precision, a dimensionless - factor which should be multiplied by a base UERE to get a - circular error estimate. + Vertical (altitude) dilution of precision, a dimensionless + factor which should be multiplied by a base UERE to get an + error estimate. - pdop + xdop No numeric - Spherical dilution of precision, a dimensionless + Longitudinal dilution of precision, a dimensionless factor which should be multiplied by a base UERE to get an error estimate. - gdop + ydop No numeric - Hyperspherical dilution of precision, a dimensionless + Latitudinal dilution of precision, a dimensionless factor which should be multiplied by a base UERE to get an error estimate. -- cgit v1.2.1