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<title>Home - All Categories - GNSS and Related Equipment  - GNSS Antennas  - Topcon PG-A1  </title>
<link>https://kb.unavco.org/category/gnss-and-related-equipment/gnss-antennas/topcon-pg-a1/102/</link>
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										<guid>https://kb.unavco.org/article/gnss-antenna-sensitivity-to-site-dependent-error-sources-757.html</guid>
										<title>GNSS Antenna Sensitivity to Site Dependent Error Sources</title>
										<link>https://kb.unavco.org/article/gnss-antenna-sensitivity-to-site-dependent-error-sources-757.html</link>
										<description><![CDATA[ GNSS Antenna Phase Center Stablity Test - TPSPG_A1+GP Background Topcon TPSPG_A1+GP&nbsp;Campaign Height Measurement Bias Problems were reported by Bob King, Adrian Borsa and other investigators regarding height estimate biases introduced when using...]]></description>

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										<guid>https://kb.unavco.org/article/topcon-pg-a1-w-ground-plane-antenna-phase-center-calibrations-709.html</guid>
										<title>Topcon PG-A1 w/Ground Plane Antenna Phase Center Calibrations</title>
										<link>https://kb.unavco.org/article/topcon-pg-a1-w-ground-plane-antenna-phase-center-calibrations-709.html</link>
										<description><![CDATA[The Topcon PG-A1 with Ground Plane is the standard antenna distributed with UNAVCO's EarthScope Topcon GB-1000 campaign systems (IGS designation: TPSPG_A1+GP)The original calibration published by the National Geodetic Survey in 2004 were found to...]]></description>

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