Galileo Receivers - Revision history

Gema.Cueto: Updated reference ICD/SDD links

2026-04-16T14:27:29Z

Updated reference ICD/SDD links

← Older revision		Revision as of 14:27, 16 April 2026
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	The Galileo global navigation satellite system employs many new methods and technologies to offer superior performance and reliability. Development of the advanced receivers required to make use of the system is continuing.<ref name="EsaGalileoweb">[http://www.esa.int/esaNA/SEMY800DU8E_galileo_0.html ESA Galileo web page]</ref>		The Galileo global navigation satellite system employs many new methods and technologies to offer superior performance and reliability. Development of the advanced receivers required to make use of the system is continuing.<ref name="EsaGalileoweb">[http://www.esa.int/esaNA/SEMY800DU8E_galileo_0.html ESA Galileo web page]</ref>

	A GALILEO Receiver is a device capable of determining a navigation solution by processing the signal broadcasted by Galileo satellites. Once the signal is acquired and tracked, the receiver application decodes the navigation message. The navigation data contain all the parameters that enable the user to perform positioning service. Data needed to perform positioning:<ref name="OS-SDD">[https://www.gsc-europa.eu/~~system~~/files/~~galileo_documents~~/Galileo-OS-~~SDD~~.pdf Galileo Open Service - Service Definition Document]</ref>		A GALILEO Receiver is a device capable of determining a navigation solution by processing the signal broadcasted by Galileo satellites. Once the signal is acquired and tracked, the receiver application decodes the navigation message. The navigation data contain all the parameters that enable the user to perform positioning service. Data needed to perform positioning:<ref name="OS-SDD">[https://www.gsc-europa.eu/sites/default/files/sites/all/files/Galileo-OS-SDD_in_force.pdf Galileo Open Service - Service Definition Document]</ref>
	# Ephemeris which are needed to compute the position of the satellite to the user receiver.		# Ephemeris which are needed to compute the position of the satellite to the user receiver.
	# Time and clock correction parameters which are needed to compute satellite clock offsets and time conversions.		# Time and clock correction parameters which are needed to compute satellite clock offsets and time conversions.
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	In an analogous way, each system has its own [[Time References in GNSS\| time reference]] defined by the respective control segments; the time reference for Galileo is called “Galileo System Time” (GST).		In an analogous way, each system has its own [[Time References in GNSS\| time reference]] defined by the respective control segments; the time reference for Galileo is called “Galileo System Time” (GST).

	Each GNSS System transmits its own navigation message, defined in the respective Signal In Space Interface Control Documents, SIS ICD<ref name="SIS_ICD">[https://www.gsc-europa.eu/sites/default/files/sites/all/files/~~Galileo_OS_SIS_ICD_v2.0~~.pdf Applicable Galileo Open Service – SIS ICD]</ref>. As an example, the satellites transmit information that allows the receiver to compute their positions. For the case of Galileo (in-line with GPS but unlike GLONASS), the satellites transmit the orbit parameters as updated by the Ground Segment and refreshed every 3 hours (in nominal operations). The Galileo receiver then [[GPS and Galileo Satellite Coordinates Computation\| computes the satellite position]] based on these transmitted ephemeris parameters.		Each GNSS System transmits its own navigation message, defined in the respective Signal In Space Interface Control Documents, SIS ICD<ref name="SIS_ICD">[https://www.gsc-europa.eu/sites/default/files/sites/all/files/Galileo_OS_SIS_ICD_in_force.pdf Applicable Galileo Open Service – SIS ICD]</ref>. As an example, the satellites transmit information that allows the receiver to compute their positions. For the case of Galileo (in-line with GPS but unlike GLONASS), the satellites transmit the orbit parameters as updated by the Ground Segment and refreshed every 3 hours (in nominal operations). The Galileo receiver then [[GPS and Galileo Satellite Coordinates Computation\| computes the satellite position]] based on these transmitted ephemeris parameters.

	Another distinction regarding the transmitted navigation message with impact on the receiver is the ionospheric parameters transmitted to support the single frequency receiver in computing the ionospheric error; Galileo uses the [[NeQuick Ionospheric Model]].		Another distinction regarding the transmitted navigation message with impact on the receiver is the ionospheric parameters transmitted to support the single frequency receiver in computing the ionospheric error; Galileo uses the [[NeQuick Ionospheric Model]].

Gema.Cueto at 09:14, 17 May 2021

2021-05-17T09:14:03Z

← Older revision		Revision as of 09:14, 17 May 2021
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	In an analogous way, each system has its own [[Time References in GNSS\| time reference]] defined by the respective control segments; the time reference for Galileo is called “Galileo System Time” (GST).		In an analogous way, each system has its own [[Time References in GNSS\| time reference]] defined by the respective control segments; the time reference for Galileo is called “Galileo System Time” (GST).

	Each GNSS System transmits its own navigation message, defined in the respective Signal In Space Interface Control Documents, SIS ICD<ref name="SIS_ICD">[https://www.gsc-europa.eu/~~system~~/files/~~galileo_documents~~/~~Galileo-OS-SIS-ICD~~.pdf Applicable Galileo Open Service – SIS ICD]</ref>. As an example, the satellites transmit information that allows the receiver to compute their positions. For the case of Galileo (in-line with GPS but unlike GLONASS), the satellites transmit the orbit parameters as updated by the Ground Segment and refreshed every 3 hours (in nominal operations). The Galileo receiver then [[GPS and Galileo Satellite Coordinates Computation\| computes the satellite position]] based on these transmitted ephemeris parameters.		Each GNSS System transmits its own navigation message, defined in the respective Signal In Space Interface Control Documents, SIS ICD<ref name="SIS_ICD">[https://www.gsc-europa.eu/sites/default/files/sites/all/files/Galileo_OS_SIS_ICD_v2.0.pdf Applicable Galileo Open Service – SIS ICD]</ref>. As an example, the satellites transmit information that allows the receiver to compute their positions. For the case of Galileo (in-line with GPS but unlike GLONASS), the satellites transmit the orbit parameters as updated by the Ground Segment and refreshed every 3 hours (in nominal operations). The Galileo receiver then [[GPS and Galileo Satellite Coordinates Computation\| computes the satellite position]] based on these transmitted ephemeris parameters.

	Another distinction regarding the transmitted navigation message with impact on the receiver is the ionospheric parameters transmitted to support the single frequency receiver in computing the ionospheric error; Galileo uses the [[NeQuick Ionospheric Model]].		Another distinction regarding the transmitted navigation message with impact on the receiver is the ionospheric parameters transmitted to support the single frequency receiver in computing the ionospheric error; Galileo uses the [[NeQuick Ionospheric Model]].

Claudia.Prajanu at 16:00, 2 April 2019

2019-04-02T16:00:54Z

← Older revision		Revision as of 16:00, 2 April 2019
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	In an analogous way, each system has its own [[Time References in GNSS\| time reference]] defined by the respective control segments; the time reference for Galileo is called “Galileo System Time” (GST).		In an analogous way, each system has its own [[Time References in GNSS\| time reference]] defined by the respective control segments; the time reference for Galileo is called “Galileo System Time” (GST).

	Each GNSS System transmits its own navigation message, defined in the respective Signal In Space Interface Control Documents, [https://www.gsc-europa.eu/system/files/galileo_documents/Galileo-OS-SIS-ICD.pdf Galileo Open Service – SIS ICD]		Each GNSS System transmits its own navigation message, defined in the respective Signal In Space Interface Control Documents, SIS ICD<ref name="SIS_ICD">[https://www.gsc-europa.eu/system/files/galileo_documents/Galileo-OS-SIS-ICD.pdf Applicable Galileo Open Service – SIS ICD]</ref>. As an example, the satellites transmit information that allows the receiver to compute their positions. For the case of Galileo (in-line with GPS but unlike GLONASS), the satellites transmit the orbit parameters as updated by the Ground Segment and refreshed every 3 hours (in nominal operations). The Galileo receiver then [[GPS and Galileo Satellite Coordinates Computation\| computes the satellite position]] based on these transmitted ephemeris parameters.
	. As an example, the satellites transmit information that allows the receiver to compute their positions. For the case of Galileo (in-line with GPS but unlike GLONASS), the satellites transmit the orbit parameters as updated by the Ground Segment and refreshed every 3 hours (in nominal operations). The Galileo receiver then [[GPS and Galileo Satellite Coordinates Computation\| computes the satellite position]] based on these transmitted ephemeris parameters.

	Another distinction regarding the transmitted navigation message with impact on the receiver is the ionospheric parameters transmitted to support the single frequency receiver in computing the ionospheric error; Galileo uses the [[NeQuick Ionospheric Model]].		Another distinction regarding the transmitted navigation message with impact on the receiver is the ionospheric parameters transmitted to support the single frequency receiver in computing the ionospheric error; Galileo uses the [[NeQuick Ionospheric Model]].
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	GNSS Receivers manufacturers have already made multi-constellation receivers designed for a variety of [[GNSS Applications\|applications]]. These receivers support a wide range of satellite signals, including Galileo signals in E1 and E5 bands. Examples for devices that implement Galileo and user receiver technology trends can be found on the GSA website and in relevant GSA publications such as Market<ref name="GSA-Market">[https://www.gsa.europa.eu/market/gnss-market GSA Market website]</ref> and User Technology reports<ref name="GSA-User-Tech">[https://www.gsa.europa.eu/european-gnss/gnss-market/gnss-user-technology-report GSA User Technology Report]</ref> respectively.		GNSS Receivers manufacturers have already made multi-constellation receivers designed for a variety of [[GNSS Applications\|applications]]. These receivers support a wide range of satellite signals, including Galileo signals in E1 and E5 bands. Examples for devices that implement Galileo and user receiver technology trends can be found on the GSA website and in relevant GSA publications such as Market<ref name="GSA-Market">[https://www.gsa.europa.eu/market/gnss-market GSA Market website]</ref> and User Technology reports<ref name="GSA-User-Tech">[https://www.gsa.europa.eu/european-gnss/gnss-market/gnss-user-technology-report GSA User Technology Report]</ref> respectively.

	~~===Commercial Receivers===~~

	Among the companies developing multi-constellation commercial receivers, both in OEM Receiver Boards and/or Enclosures Receivers already on-sale, we can find (non exhaustive list):<ref name="useGalileo">[https://www.usegalileo.eu/EN/ useGalileo website]</ref>
	*[http://www.javad.com/jgnss/products/receivers/delta.html Javad]
	*[http://www.leica-geosystems.com/en/Leica-GRX1200-Series_5547.htm Leica]
	*[http://www.maxim-ic.com/datasheet/index.mvp/id/5241 Maxim]
	*[http://www.novatel.com/products/gnss-receivers/ Novatel]
	*[http://www.septentrio.com/products/gnss-receivers Septentrio]
	*[http://www.topcon.co.jp/en/positioning/products/product/gnss/ TopCon]
	*[http://www.trimble.com/Our_Product/products_main.aspx Trimble]

	The corresponding datasheet for each receiver (available in the company website) claims Galileo receivers compliant to Galileo Open Service SIS ICD<ref name="SIS_ICD">[https://www.gsc-europa.eu/system/files/galileo_documents/Galileo-OS-SIS-ICD.pdf Galileo OS SIS ICD Issue 1 Revision 1 September 2010e]</ref>.
	Furthermore, there are studies showing the advantage of using a modelling language to facilitate the implementation of the navigation message decoding in the receivers, in-line with the Galileo SIS ICD<ref>D. Gianni, M. Lisi, P. De Simone, A. D’Ambrogio and M. Luglio, “A Model-based Signal-in-Space Interface Specification to Support the Design of Galileo Receivers”, in 6th ESA Workshop on Satellite Navigation Technologies, December, 2012, Noordwijk, The Netherlands.</ref>.

	~~===Scientific/ Space Receivers===~~

	~~A few examples of scientific and space receivers (non-exhaustive list):~~
	*[http://www.broadreachengineering.com/products/spaceborne-gps-receivers BroadReach]
	*[http://www.ifen.com IFEN]

	~~There is more information on [[Space Applications]] in NAVIPEDIA and also on [https://www.usegalileo.eu/EN/ GSA website].~~


	The Open Service Interface Control Document (ICD) for Galileo is available ~~on the European GNSS Service Centre website~~ <ref>~~[https://www.gsa.europa.eu/ European GNSS Agency (GSA)]~~</ref>, so receiver manufacturers can already work to prepare the acquisition of real Galileo data.		The Open Service Interface Control Document (ICD) for Galileo is available<ref name="SIS_ICD"></ref>, so receiver manufacturers can already work to prepare the acquisition of real Galileo data.
	Furthermore, the European GNSS Agency (GSA) has been supporting a number of activities within the user segment<ref ~~name="OS-SDD"~~/>.		Furthermore, the European GNSS Agency (GSA) has been supporting a number of activities within the user segment<ref>[https://www.gsa.europa.eu/ European GNSS Agency (GSA)]</ref>.

	==References==		==References==

Claudia.Prajanu at 13:12, 26 March 2019

2019-03-26T13:12:53Z

← Older revision		Revision as of 13:12, 26 March 2019
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	The Galileo global navigation satellite system employs many new methods and technologies to offer superior performance and reliability. Development of the advanced receivers required to make use of the system is continuing.<ref name="EsaGalileoweb">[http://www.esa.int/esaNA/SEMY800DU8E_galileo_0.html ESA Galileo web page]</ref>		The Galileo global navigation satellite system employs many new methods and technologies to offer superior performance and reliability. Development of the advanced receivers required to make use of the system is continuing.<ref name="EsaGalileoweb">[http://www.esa.int/esaNA/SEMY800DU8E_galileo_0.html ESA Galileo web page]</ref>

	A GALILEO Receiver is a device capable of determining a navigation solution by processing the signal broadcasted by Galileo satellites. Once the signal is acquired and tracked, the receiver application decodes the navigation message. The navigation data contain all the parameters that enable the user to perform positioning service. Data needed to perform positioning:<ref name="OS-SDD">[https://www.gsc-europa.eu/system/files/galileo_documents/Galileo-OS-SDD.pdf Galileo ~~OS SDD Issue 1 Revision 1 September 2016~~]</ref>		A GALILEO Receiver is a device capable of determining a navigation solution by processing the signal broadcasted by Galileo satellites. Once the signal is acquired and tracked, the receiver application decodes the navigation message. The navigation data contain all the parameters that enable the user to perform positioning service. Data needed to perform positioning:<ref name="OS-SDD">[https://www.gsc-europa.eu/system/files/galileo_documents/Galileo-OS-SDD.pdf Galileo Open Service - Service Definition Document]</ref>
	# Ephemeris which are needed to compute the position of the satellite to the user receiver.		# Ephemeris which are needed to compute the position of the satellite to the user receiver.
	# Time and clock correction parameters which are needed to compute satellite clock offsets and time conversions.		# Time and clock correction parameters which are needed to compute satellite clock offsets and time conversions.
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	For single frequency receivers, the Broadcast Group Delays are also needed.		For single frequency receivers, the Broadcast Group Delays are also needed.

	Up-to-date ephemeris are needed to indicate the position of the satellite to the user receiver. Time and clock correction parameters for all the satellites are needed to compute pseudo-range. Receivers must retrieve the values of navigation parameters relevant to the type of navigation solution to be computed from the most recent navigation data set broadcast on a Healthy SIS by the Galileo system after the start of the current receiver operation~~. The Minimum Performance Levels are expected to be met by the navigation solution if the receivers do not use navigation parameters beyond their broadcast period~~. The navigation performance can be increased by implementing fault detection and isolation algorithms, as those based on the consistency of redundant pseudorange data sets (such as Receiver Autonomous Integrity Monitoring algorithms)<ref name="OS-SDD"/>.		Up-to-date ephemeris are needed to indicate the position of the satellite to the user receiver. Time and clock correction parameters for all the satellites are needed to compute pseudo-range. Receivers must retrieve the values of navigation parameters relevant to the type of navigation solution to be computed from the most recent navigation data set broadcast on a Healthy SIS by the Galileo system after the start of the current receiver operation. The navigation performance can be increased by implementing fault detection and isolation algorithms, as those based on the consistency of redundant pseudorange data sets (such as Receiver Autonomous Integrity Monitoring algorithms)<ref name="OS-SDD"/>.

	==Particularities==		==Particularities==
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	In an analogous way, each system has its own [[Time References in GNSS\| time reference]] defined by the respective control segments; the time reference for Galileo is called “Galileo System Time” (GST).		In an analogous way, each system has its own [[Time References in GNSS\| time reference]] defined by the respective control segments; the time reference for Galileo is called “Galileo System Time” (GST).

	Each GNSS System transmits its own navigation message, defined in the respective Signal In Space Interface Control Documents, SIS ICD. As an example, the satellites transmit information that allows the receiver to compute their positions. For the case of Galileo (in-line with GPS but unlike GLONASS), the satellites transmit the orbit parameters as updated by the Ground Segment and refreshed every 3 hours (in nominal operations). The Galileo receiver then [[GPS and Galileo Satellite Coordinates Computation\| computes the satellite position]] based on these transmitted ephemeris parameters.		Each GNSS System transmits its own navigation message, defined in the respective Signal In Space Interface Control Documents, [https://www.gsc-europa.eu/system/files/galileo_documents/Galileo-OS-SIS-ICD.pdf Galileo Open Service – SIS ICD]
			. As an example, the satellites transmit information that allows the receiver to compute their positions. For the case of Galileo (in-line with GPS but unlike GLONASS), the satellites transmit the orbit parameters as updated by the Ground Segment and refreshed every 3 hours (in nominal operations). The Galileo receiver then [[GPS and Galileo Satellite Coordinates Computation\| computes the satellite position]] based on these transmitted ephemeris parameters.

	Another distinction regarding the transmitted navigation message with impact on the receiver is the ionospheric parameters transmitted to support the single frequency receiver in computing the ionospheric error; Galileo uses the [[NeQuick Ionospheric Model]].		Another distinction regarding the transmitted navigation message with impact on the receiver is the ionospheric parameters transmitted to support the single frequency receiver in computing the ionospheric error; Galileo uses the [[NeQuick Ionospheric Model]].
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	==Receivers==		==Receivers==

	GNSS Receivers manufacturers have already made multi-constellation receivers designed for a variety of [[GNSS Applications\|applications]]. These receivers support a wide range of satellite signals, including Galileo signals in E1 and E5 bands. Examples for devices that implement Galileo can be found on the GSA website <ref name="GSA-Market">[https://www.gsa.europa.eu/market/gnss-market GSA Market website]</ref><ref name="GSA-User-Tech">[https://www.gsa.europa.eu/european-gnss/gnss-market/gnss-user-technology-report GSA User Technology Report]</ref>		GNSS Receivers manufacturers have already made multi-constellation receivers designed for a variety of [[GNSS Applications\|applications]]. These receivers support a wide range of satellite signals, including Galileo signals in E1 and E5 bands. Examples for devices that implement Galileo and user receiver technology trends can be found on the GSA website and in relevant GSA publications such as Market<ref name="GSA-Market">[https://www.gsa.europa.eu/market/gnss-market GSA Market website]</ref> and User Technology reports<ref name="GSA-User-Tech">[https://www.gsa.europa.eu/european-gnss/gnss-market/gnss-user-technology-report GSA User Technology Report]</ref> respectively.

	===Commercial Receivers===		===Commercial Receivers===

Claudia.Prajanu at 20:32, 7 March 2019

2019-03-07T20:32:52Z

Show changes

Claudia.Prajanu at 12:13, 25 July 2018

2018-07-25T12:13:02Z

← Older revision		Revision as of 12:13, 25 July 2018
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	A few examples of scientific and space receivers (non-exhaustive list):		A few examples of scientific and space receivers (non-exhaustive list):
	*[http://payloadsystems.esa.int/static/TEC-ETN/receivers.html GPS/Galileo miniaturised space Rx ]
	*[http://www.broadreachengineering.com/products/spaceborne-gps-receivers BroadReach]		*[http://www.broadreachengineering.com/products/spaceborne-gps-receivers BroadReach]
	*[http://www.ifen.com IFEN]		*[http://www.ifen.com IFEN]

Claudia.Prajanu at 10:41, 12 June 2018

2018-06-12T10:41:24Z

Paulo.Pombal: /* Commercial Receivers */

2015-10-20T15:58:39Z

Commercial Receivers

← Older revision		Revision as of 15:58, 20 October 2015
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	*[http://www.maxim-ic.com/datasheet/index.mvp/id/5241 Maxim]		*[http://www.maxim-ic.com/datasheet/index.mvp/id/5241 Maxim]
	*[http://www.novatel.com/products/gnss-receivers/ Novatel]		*[http://www.novatel.com/products/gnss-receivers/ Novatel]
	*[http://www.septentrio.com/products/receivers/ Septentrio]		*[http://www.septentrio.com/products/gnss-receivers Septentrio]
	*[http://www.topcon.co.jp/en/positioning/products/product/gnss/ TopCon]		*[http://www.topcon.co.jp/en/positioning/products/product/gnss/ TopCon]
	*[http://www.trimble.com/Our_Product/products_main.aspx Trimble]		*[http://www.trimble.com/Our_Product/products_main.aspx Trimble]

Filipe.Pelica: Included editor logo.

2014-09-18T17:06:45Z

Included editor logo.

← Older revision		Revision as of 17:06, 18 September 2014
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	\|Level=Intermediate		\|Level=Intermediate
	\|YearOfPublication=2011		\|YearOfPublication=2011
			\|Logo=GMV
	\|Title={{PAGENAME}}		\|Title={{PAGENAME}}
	}}		}}

Filipe.Pelica: /* First achievements */

2014-05-29T13:32:39Z

First achievements

← Older revision		Revision as of 13:32, 29 May 2014
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	The Open Service Interface Control Document (ICD) for Galileo is available on the European Commission website <ref>[http://ec.europa.eu/enterprise/policies/satnav/galileo/open-service/index_en.htm European Commission Galileo website]</ref>, so receiver manufacturers can already work to prepare the acquisition of real Galileo data.		The Open Service Interface Control Document (ICD) for Galileo is available on the European Commission website <ref>[http://ec.europa.eu/enterprise/policies/satnav/galileo/open-service/index_en.htm European Commission Galileo website]</ref>, so receiver manufacturers can already work to prepare the acquisition of real Galileo data.
	Furthermore, the European GNSS Agency (GSA) has been supporting a number of activities within the user segment <ref>[http://www.gsa.europa.eu/ European GNSS Agency (GSA)</ref>.		Furthermore, the European GNSS Agency (GSA) has been supporting a number of activities within the user segment<ref>[http://www.gsa.europa.eu/ European GNSS Agency (GSA)]</ref>.

	==References==		==References==

← Older revision		Revision as of 10:41, 12 June 2018
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	The Galileo global navigation satellite system will employ many new methods and technologies to offer superior performance and reliability. Development of the advanced receivers required to make use of the system is continuing.<ref name="EsaGalileoweb">[http://www.esa.int/esaNA/SEMY800DU8E_galileo_0.html ESA Galileo web page]</ref>		The Galileo global navigation satellite system will employ many new methods and technologies to offer superior performance and reliability. Development of the advanced receivers required to make use of the system is continuing.<ref name="EsaGalileoweb">[http://www.esa.int/esaNA/SEMY800DU8E_galileo_0.html ESA Galileo web page]</ref>

	A GALILEO Receiver is a device capable of determining a navigation solution by processing the signal broadcasted by Galileo satellites. Once the signal is acquired and tracked, the receiver application decodes the navigation message. The navigation data contain all the parameters that enable the user to perform positioning service. The four types of data needed to perform positioning are:<ref name="SIS_ICD">[http://ec.europa.eu/~~enterprise~~/~~policies~~/~~satnav~~/~~galileo~~/~~files~~/~~galileo-os-sis-icd-issue1-revision1_en.pdf~~ Galileo OS SIS ICD Issue 1 Revision 1 September 2010e]</ref>		A GALILEO Receiver is a device capable of determining a navigation solution by processing the signal broadcasted by Galileo satellites. Once the signal is acquired and tracked, the receiver application decodes the navigation message. The navigation data contain all the parameters that enable the user to perform positioning service. The four types of data needed to perform positioning are:<ref name="SIS_ICD">[http://ec.europa.eu/DocsRoom/documents/11870/attachments/1/translations/en/renditions/native Galileo OS SIS ICD Issue 1 Revision 1 September 2010e]</ref>
	# Ephemeris which are needed to indicate the position of the satellite to the user receiver.		# Ephemeris which are needed to indicate the position of the satellite to the user receiver.
	# Time and clock correction parameters which are needed to compute pseudo-range.		# Time and clock correction parameters which are needed to compute pseudo-range.
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	*[http://payloadsystems.esa.int/static/TEC-ETN/receivers.html GPS/Galileo miniaturised space Rx ]		*[http://payloadsystems.esa.int/static/TEC-ETN/receivers.html GPS/Galileo miniaturised space Rx ]
	*[http://www.broadreachengineering.com/products/spaceborne-gps-receivers BroadReach]		*[http://www.broadreachengineering.com/products/spaceborne-gps-receivers BroadReach]
	*[http://www.ifen.com~~/sx-nsr~~ IFEN]		*[http://www.ifen.com IFEN]

	There is more information on [[Space Applications]] in NAVIPEDIA.		There is more information on [[Space Applications]] in NAVIPEDIA.
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	Prototype receivers have also been used for verification of the payloads on the experimental satellites, GIOVE-A and GIOVE-B. They are also being used for validation of the satellite constellation simulator, which emulates the signals as generated by the satellites and modified by environmental effects (such as atmospheric effects, multi-path reception and interference), resulting in a signal that a user receiver would see on the ground.		Prototype receivers have also been used for verification of the payloads on the experimental satellites, GIOVE-A and GIOVE-B. They are also being used for validation of the satellite constellation simulator, which emulates the signals as generated by the satellites and modified by environmental effects (such as atmospheric effects, multi-path reception and interference), resulting in a signal that a user receiver would see on the ground.

	The Open Service Interface Control Document (ICD) for Galileo is available on the European Commission website <ref>[http://ec.europa.eu/~~enterprise~~/~~policies~~/~~satnav~~/~~galileo/open-service/index_en.htm~~ European Commission Galileo website]</ref>, so receiver manufacturers can already work to prepare the acquisition of real Galileo data.		The Open Service Interface Control Document (ICD) for Galileo is available on the European Commission website <ref>[http://ec.europa.eu/growth/sectors/space/galileo_en European Commission Galileo website]</ref>, so receiver manufacturers can already work to prepare the acquisition of real Galileo data.
	Furthermore, the European GNSS Agency (GSA) has been supporting a number of activities within the user segment<ref>[http://www.gsa.europa.eu/ European GNSS Agency (GSA)]</ref>.		Furthermore, the European GNSS Agency (GSA) has been supporting a number of activities within the user segment<ref>[http://www.gsa.europa.eu/ European GNSS Agency (GSA)]</ref>.