Long-term stability of altimetric data with applications to mean sea-level change
The oceanographic community has access to near 14 years of altimetric data ranging from GEOSAT in 1985–1989 to the current TOPEX/Poseidon and ERS-2 missions. For sealevel change studies careful validation is required to avoid contamination of the results by spurious nonoceanographic effects. In this study we first utilise in situ tide gauge data to monitor stability of the TOPEX/Poseidon data base. This series is linked to both ERS satellites by dual satellite crossovers. The analysis is then extended to incorporate GEOSAT ERM data through tide gauge enhanced dual satellite crossovers with TOPEX. Results of the stability analysis are used to consider global mean sea-level change over the period 1986–1998.
KeywordsAltimetry mean sea-level change
Unable to display preview. Download preview PDF.
- Benveniste, J (1998) Calibration/validation of ERS-2 altimetryESA publication in press.Google Scholar
- Eanes R J and S V Bettadpur (1995). The CSR 3.0 global ocean tide modelCSR-TM-95-06, Center for Space Research, University of Texas at Austin.Google Scholar
- Francis, CR (1993). The height calibration of the ERS-1 radar altimeterProceedings of the First ERS-1 Symposium, ESA SP-359, pp 381–394.Google Scholar
- Hayne G, S Hancock III and C Purdy (1994). TOPEX altimeter range stability estimates from calibration mode data. TOPEX/Poseidon Research News3, pp 18–20.Google Scholar
- Kubitschek DG et al. (1997). Calibration methods for the TOPEX and Poseidon altimetry systems (abstract). Annales geophys, 15, Suppl. 1, p. C196.Google Scholar
- Moore P et al. (1999a). Investigation of the stability of the ERS-1 range bias through tide guage augmented altimetry. J. Geophys. Resin press.Google Scholar
- Rosborough G W (1986).Satellite orbit perturbations due to the geopotential. CSR-86-1, Center for Space Research, University of Texas at Austin.Google Scholar
- Wagner CA, J Klokocnik R Cheney (1997). Making the connection between GEOSAT and TOPEX/Poseidon. J. Geodesy71, pp 272–281.Google Scholar