1994
DOI: 10.1029/94jc01641
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Calibration of TOPEX/POSEIDON at Platform Harvest

Abstract: We present estimates for the mean bias of the TOPEX/POSEIDON NASA altimeter (ALT) and the Centre National d'Etudes Spatiales altimeter (SSALT) using in situ data gathered at Platform Harvest during the first 36 cycles of the mission. Data for 21 overflights of the ALT and six overflights of the SSALT have been analyzed. The analysis includes an independent assessment of in situ measurements of sea level, the radial component of the orbit, wet tropospheric path delay, and ionospheric path delay. (The sign conve… Show more

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Cited by 107 publications
(33 citation statements)
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“…At the same time, WV reveals very rapid changes both in the temporal and in the spatial domains such that, at present, there are no theoretical models that can reliably predict its behaviour. Retrieving WV content in the atmosphere can be performed in different ways using independent techniques: starting from the more traditional and established ones, such as radiosondes and ground-based microwave radiometers, up to the more recent ones, such as satellite based techniques like satellite radiometers (Christensen et al 1994), Global Navigation Satellite Systems (GNSS) (Bevis et al 1992), Radio Occultation (Kursinski et al 1997) and Numerical Weather Models (NWM). Since each of these techniques presents advantages and limitations, researchers' efforts have been recently focused on comparing the different approaches with the aim of combining them to retrieve WV content with the highest possible accuracy.…”
Section: Introductionmentioning
confidence: 99%
“…At the same time, WV reveals very rapid changes both in the temporal and in the spatial domains such that, at present, there are no theoretical models that can reliably predict its behaviour. Retrieving WV content in the atmosphere can be performed in different ways using independent techniques: starting from the more traditional and established ones, such as radiosondes and ground-based microwave radiometers, up to the more recent ones, such as satellite based techniques like satellite radiometers (Christensen et al 1994), Global Navigation Satellite Systems (GNSS) (Bevis et al 1992), Radio Occultation (Kursinski et al 1997) and Numerical Weather Models (NWM). Since each of these techniques presents advantages and limitations, researchers' efforts have been recently focused on comparing the different approaches with the aim of combining them to retrieve WV content with the highest possible accuracy.…”
Section: Introductionmentioning
confidence: 99%
“…during the 'verification phase'; ALT was on for the remainder. We have used measurements from both altimeters, correcting SSALT ranges for the 15.4 cm relative bias reported by Christensen et al (1994).…”
Section: Datamentioning
confidence: 99%
“…Previous altimeter calibration campaigns have employed GPS buoys with distances to GPS reference sites not exceeding 20 km (Christensen et al, 1994;Born et al, 1994;Key et al, 1999;Zilkoski et al, 1999). In the GRAC experiments, the nearest reference station was at 80 km, which, in principle, makes unreliable the use of the tropospheric solution from the reference site.…”
Section: Introductionmentioning
confidence: 99%