On the “Cal-Mode” Correction to TOPEX Satellite Altimetry and Its Effect on the Global Mean Sea Level Time Series. Beckley, B. D.; Callahan, P. S.; Hancock, D. W.; Mitchum, G. T.; and Ray, R. D. 122(11):8371–8384. Number: 11
On the “Cal-Mode” Correction to TOPEX Satellite Altimetry and Its Effect on the Global Mean Sea Level Time Series [link]Paper  doi  abstract   bibtex   
Comparison of satellite altimetry against a high-quality network of tide gauges suggests that sea-surface heights from the TOPEX altimeter may be biased by ±5 mm, in an approximate piecewise linear, or U-shaped, drift. This has been previously reported in at least two other studies. The bias is probably caused by use of an internal calibration-mode range correction, included in the TOPEX “net instrument” correction, which is suspect owing to changes in the altimeter's point target response. Removal of this correction appears to mitigate most of the drift problem. In addition, a new time series based on retracking the TOPEX waveforms, again without the calibration-mode correction, also reduces the drift aside for a clear problem during the first 2 years. With revision, the TOPEX measurements, combined with successor Jason altimeter measurements, show global mean sea level rising fairly steadily throughout most of 24 year time period, with rates around 3 mm/yr, although higher over the last few years.
@article{beckley_cal-mode_2017,
	title = {On the “Cal-Mode” Correction to {TOPEX} Satellite Altimetry and Its Effect on the Global Mean Sea Level Time Series},
	volume = {122},
	rights = {© 2017. American Geophysical Union. All Rights Reserved.},
	issn = {2169-9291},
	url = {http://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2017JC013090},
	doi = {10.1002/2017JC013090},
	abstract = {Comparison of satellite altimetry against a high-quality network of tide gauges suggests that sea-surface heights from the {TOPEX} altimeter may be biased by ±5 mm, in an approximate piecewise linear, or U-shaped, drift. This has been previously reported in at least two other studies. The bias is probably caused by use of an internal calibration-mode range correction, included in the {TOPEX} “net instrument” correction, which is suspect owing to changes in the altimeter's point target response. Removal of this correction appears to mitigate most of the drift problem. In addition, a new time series based on retracking the {TOPEX} waveforms, again without the calibration-mode correction, also reduces the drift aside for a clear problem during the first 2 years. With revision, the {TOPEX} measurements, combined with successor Jason altimeter measurements, show global mean sea level rising fairly steadily throughout most of 24 year time period, with rates around 3 mm/yr, although higher over the last few years.},
	pages = {8371--8384},
	number = {11},
	journaltitle = {Journal of Geophysical Research: Oceans},
	author = {Beckley, B. D. and Callahan, P. S. and Hancock, D. W. and Mitchum, G. T. and Ray, R. D.},
	urldate = {2020-01-27},
	date = {2017},
	langid = {english},
	note = {Number: 11},
	keywords = {satellite altimetry, {TOPEX}, mean sea level}
}
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