Reference Frames in GNSS - Revision history

Gema.Cueto: Updated reference ICD/SDD links

2026-04-17T11:25:41Z

Updated reference ICD/SDD links

← Older revision		Revision as of 11:25, 17 April 2026
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	According to the GLONASS modernisation plan<ref>[http://gpsworld.com/directions-2014-new-horizons-of-glonass/ Directions 2014: New Horizons of GLONASS], GPS World, Denis Lyskov, Deputy Head of the Russian Space Agency, Roscosmos, December 1, 2013</ref>, the ephemeris information implementing the PZ-90.11 reference system was updated on all operational GLONASS satellites starting from 3:00 pm on December 31, 2013<ref>[https://~~www.~~glonass-iac.ru/~~GLONASS~~/stehos/stehos_en.pdf GLONASS Open Service Performance Standard ]</ref>. From this time on, the satellites are broadcasting in the PZ-90.11<ref>[http://www.glonass-iac.ru/en/content/news/?ELEMENT_ID=721 The transition to using the terrestrial geocentric coordinate system PZ-90.11 in operating GLONASS system has been implemented], Russian Federal Space Agency, Information-analytical centre, 4 April 2014</ref>. This ECEF reference frame is an updated version of PZ-90, closest to the ITRF2000.		According to the GLONASS modernisation plan<ref>[http://gpsworld.com/directions-2014-new-horizons-of-glonass/ Directions 2014: New Horizons of GLONASS], GPS World, Denis Lyskov, Deputy Head of the Russian Space Agency, Roscosmos, December 1, 2013</ref>, the ephemeris information implementing the PZ-90.11 reference system was updated on all operational GLONASS satellites starting from 3:00 pm on December 31, 2013<ref>[https://glonass-iac.ru/upload/docs/stehos/stehos_en.pdf GLONASS Open Service Performance Standard ]</ref>. From this time on, the satellites are broadcasting in the PZ-90.11<ref>[http://www.glonass-iac.ru/en/content/news/?ELEMENT_ID=721 The transition to using the terrestrial geocentric coordinate system PZ-90.11 in operating GLONASS system has been implemented], Russian Federal Space Agency, Information-analytical centre, 4 April 2014</ref>. This ECEF reference frame is an updated version of PZ-90, closest to the ITRF2000.

Gema.Cueto at 10:55, 16 April 2026

2026-04-16T10:55:11Z

← Older revision		Revision as of 10:55, 16 April 2026
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	== [[GLONASS General Introduction\|GLONASS]] reference frame PZ-90 ==		== [[GLONASS General Introduction\|GLONASS]] reference frame PZ-90 ==

	The GLONASS broadcast ephemeris are given in the Parametry Zemli 1990 (Parameters of the Earth 1990) (PZ-90) reference frame. As the WGS-84, this is an ECEF frame with a set of fundamental parameters associated (see table 2 from [GLONASS ICD, ~~2008~~]<ref name=~~GLONASS_ICD_2008~~>[https://~~www.gsc~~-~~europa~~.~~eu/sites/default/files~~/~~sites~~/~~all~~/~~files~~/~~Galileo-OS-SDD_v1.1~~.pdf GLONASS ICD, ~~2008. Technical report. v.5.1.~~]</ref>).		The GLONASS broadcast ephemeris are given in the Parametry Zemli 1990 (Parameters of the Earth 1990) (PZ-90) reference frame. As the WGS-84, this is an ECEF frame with a set of fundamental parameters associated (see table 2 from [GLONASS ICD, 2020]<ref name=GLONASS_ICD_2020>[https://glonass-iac.ru/upload/docs/stehos/stehos_en.pdf GLONASS ICD, 2020]</ref>).


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	The parameters associated to the PZ-90 and PZ-90.11 are given in the next table 2 ([GLONASS ICD, 1998]<ref>[GLONASS ICD, 1998] ~~GLONASS ICD, 1998. Technical report. v.4.0.~~</ref> and [GLONASS ICD, ~~2008~~]<ref name=~~GLONASS_ICD_2008~~/>):		The parameters associated to the PZ-90 and PZ-90.11 are given in the next table 2 ([GLONASS ICD, 1998]<ref>[https://www.unavco.org/help/glossary/docs/ICD_GLONASS_4.0_(1998)_en.pdf GLONASS ICD, 1998]</ref> and [GLONASS ICD, 2020]<ref name=GLONASS_ICD_2020/>):

Gema.Cueto: /* BeiDou Coordinate System (BDC) */

2021-02-23T12:30:18Z

BeiDou Coordinate System (BDC)

← Older revision		Revision as of 12:30, 23 February 2021
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	Please find below the geodetic constants and parameters of Earth Ellipsoid CGCS2000:		Please find below the geodetic constants and parameters of Earth Ellipsoid CGCS2000:

	::::[[File:BeiDou.png\|none\|540px]]		::::[[File:BeiDou.png\|none\|thumb\|540px]]

	==Notes==		==Notes==

Gema.Cueto: /* BeiDou Coordinate System (BDC) */

2021-02-23T12:21:32Z

BeiDou Coordinate System (BDC)

← Older revision		Revision as of 12:21, 23 February 2021
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	Please find below the geodetic constants and parameters of Earth Ellipsoid CGCS2000:		Please find below the geodetic constants and parameters of Earth Ellipsoid CGCS2000:

	::::[[File:BeiDou.png\|none\|~~720px~~]]		::::[[File:BeiDou.png\|none\|540px]]

	==Notes==		==Notes==

Gema.Cueto: /* BeiDou Coordinate System (BDC) */

2021-02-23T12:21:10Z

BeiDou Coordinate System (BDC)

← Older revision		Revision as of 12:21, 23 February 2021
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	Please find below the geodetic constants and parameters of Earth Ellipsoid CGCS2000:		Please find below the geodetic constants and parameters of Earth Ellipsoid CGCS2000:

	::::[[File:~~CGCS2000~~.png\|none\|720px]]		::::[[File:BeiDou.png\|none\|720px]]

	==Notes==		==Notes==

Gema.Cueto: /* GPS reference frame WGS-84 */

2021-02-23T12:19:55Z

GPS reference frame WGS-84

← Older revision		Revision as of 12:19, 23 February 2021
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	The initial implementation of WGS-84 was realized from a set of more than a thousand terrestrial sites, which coordinates were derived from Transit observations <ref group="footnotes">With accuracy at the level of 1-2 meters, while the accuracy of the ITRF reference stations is at the centimetre level.</ref>. Successive refinements (which also leaded to some adjustments of the fundamental constants), using more accurate coordinates of the monitor stations, approximate to some ITRS realizations. For instance, realizations WGS84(G730) <ref group="footnotes">"G" indicates that it has exclusively been obtained with GPS observations and 730 indicates the GPS week.</ref> and WGS84(G873) correspond to ITRF92 and ITRF94, respectively. The refined frame WGS84(G1150) was introduced in 2002, which agrees with ITRF2000 at the centimetre level. The most recent version is WGS-84 (G1762 <ref>[https://epsg.io/7664 WGS-84 (G1762) Information]</ref>) and was implemented on October 2013 and is aligned to the International GNSS Service (IGS) realisation of the ITRF2008<ref>[https://earth-info.nga.mil/GandG/publications/NGA_STND_0036_1_0_0_WGS84/NGA.STND.0036_1.0.0_WGS84.pdf National Geospatial-Intelligence Agency (NGA) Standardization Document World Geodetic System 1984]</ref>.		The initial implementation of WGS-84 was realized from a set of more than a thousand terrestrial sites, which coordinates were derived from Transit observations <ref group="footnotes">With accuracy at the level of 1-2 meters, while the accuracy of the ITRF reference stations is at the centimetre level.</ref>. Successive refinements (which also leaded to some adjustments of the fundamental constants), using more accurate coordinates of the monitor stations, approximate to some ITRS realizations. For instance, realizations WGS84(G730) <ref group="footnotes">"G" indicates that it has exclusively been obtained with GPS observations and 730 indicates the GPS week.</ref> and WGS84(G873) correspond to ITRF92 and ITRF94, respectively. The refined frame WGS84(G1150) was introduced in 2002, which agrees with ITRF2000 at the centimetre level. The most recent version is WGS-84 (G1762 <ref>[https://epsg.io/7664 WGS-84 (G1762) Information]</ref>) and was implemented on October 2013 and is aligned to the International GNSS Service (IGS) realisation of the ITRF2008<ref name="NGA">[https://earth-info.nga.mil/GandG/publications/NGA_STND_0036_1_0_0_WGS84/NGA.STND.0036_1.0.0_WGS84.pdf National Geospatial-Intelligence Agency (NGA) Standardization Document World Geodetic System 1984]</ref>.


	The parameters of the WGS-84 ellipsoid are given in the following table 1:		The parameters of the WGS-84 ellipsoid are given in the following table 1:

	::[[File:WGS84_Table.png\|none\|thumb\|640px\|'''''Table 1:''''' Ellipsoidal parameters WGS-84 (revised in 1997) and also in NGA Standard<ref>[https://earth-info.nga.mil/GandG/publications/NGA_STND_0036_1_0_0_WGS84/NGA.STND.0036_1.0.0_WGS84.pdf National Geospatial-Intelligence Agency (NGA) Standardization Document World Geodetic System 1984]</ref>.]]		::[[File:WGS84_Table.png\|none\|thumb\|640px\|'''''Table 1:''''' Ellipsoidal parameters WGS-84 (revised in 1997) and also in NGA Standard<ref name="NGA">[https://earth-info.nga.mil/GandG/publications/NGA_STND_0036_1_0_0_WGS84/NGA.STND.0036_1.0.0_WGS84.pdf National Geospatial-Intelligence Agency (NGA) Standardization Document World Geodetic System 1984]</ref>.]]

	== [[GLONASS General Introduction\|GLONASS]] reference frame PZ-90 ==		== [[GLONASS General Introduction\|GLONASS]] reference frame PZ-90 ==

Gema.Cueto at 12:18, 23 February 2021

2021-02-23T12:18:41Z

← Older revision		Revision as of 12:18, 23 February 2021
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	The parameters of the WGS-84 ellipsoid are given in the following table 1:		The parameters of the WGS-84 ellipsoid are given in the following table 1:

	::[[File:WGS84_Table.png\|none\|thumb\|640px\|'''''Table 1:''''' Ellipsoidal parameters WGS-84 (revised in 1997) and also in NGA Standard<ref>[https://earth-info.nga.mil/GandG/publications/NGA_STND_0036_1_0_0_WGS84/NGA.STND.0036_1.0.0_WGS84.pdf NGA ~~Standard~~]</ref>.]]		::[[File:WGS84_Table.png\|none\|thumb\|640px\|'''''Table 1:''''' Ellipsoidal parameters WGS-84 (revised in 1997) and also in NGA Standard<ref>[https://earth-info.nga.mil/GandG/publications/NGA_STND_0036_1_0_0_WGS84/NGA.STND.0036_1.0.0_WGS84.pdf National Geospatial-Intelligence Agency (NGA) Standardization Document World Geodetic System 1984]</ref>.]]

	== [[GLONASS General Introduction\|GLONASS]] reference frame PZ-90 ==		== [[GLONASS General Introduction\|GLONASS]] reference frame PZ-90 ==

Gema.Cueto: /* GPS reference frame WGS-84 */

2021-02-22T15:24:20Z

GPS reference frame WGS-84

← Older revision		Revision as of 15:24, 22 February 2021
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	The parameters of the WGS-84 ellipsoid are given in the following table 1:		The parameters of the WGS-84 ellipsoid are given in the following table 1:

	::[[File:WGS84_Table.png\|none\|thumb\|640px\|'''''Table 1:''''' Ellipsoidal parameters WGS-84 (revised in 1997) and also in.]]		::[[File:WGS84_Table.png\|none\|thumb\|640px\|'''''Table 1:''''' Ellipsoidal parameters WGS-84 (revised in 1997) and also in NGA Standard<ref>[https://earth-info.nga.mil/GandG/publications/NGA_STND_0036_1_0_0_WGS84/NGA.STND.0036_1.0.0_WGS84.pdf NGA Standard]</ref>.]]

	== [[GLONASS General Introduction\|GLONASS]] reference frame PZ-90 ==		== [[GLONASS General Introduction\|GLONASS]] reference frame PZ-90 ==

Gema.Cueto: /* BeiDou Coordinate System (BDC) */

2021-02-22T14:38:52Z

BeiDou Coordinate System (BDC)

← Older revision		Revision as of 14:38, 22 February 2021
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	Please find below the geodetic constants and parameters of Earth Ellipsoid CGCS2000:		Please find below the geodetic constants and parameters of Earth Ellipsoid CGCS2000:

	::::[[File:CGCS2000.png\|none\|~~580px~~]]		::::[[File:CGCS2000.png\|none\|720px]]

	==Notes==		==Notes==

Gema.Cueto: /* BeiDou Coordinate System (BDC) */

2021-02-22T14:38:29Z

BeiDou Coordinate System (BDC)

← Older revision		Revision as of 14:38, 22 February 2021
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	Please find below the geodetic constants and parameters of Earth Ellipsoid CGCS2000:		Please find below the geodetic constants and parameters of Earth Ellipsoid CGCS2000:

	::::[[File:CGCS2000.png\|none\|~~420px~~]]		::::[[File:CGCS2000.png\|none\|580px]]

	==Notes==		==Notes==