The thread is at max depth, so I'll reply here:
As you quoted from the paper:
> The six main groups that provide satellite-altimetry-based GMSL estimates ...
1) You're restricting your attention to groups producing satellite-derived estimates.
2) Several of those groups, e.g. CSIRO, are using data assimilation to combine satellite estimates with gauges [1].
3) There are multiple satellites, often overlapping in time, often of totally different design/orbit/etc... [2]
4) Up to the most recent IPCC report (AR6), assessments were based on tide gauges alone [3]. For many of the reasons that you bring up. Hence "Nobody relies on estimates from a single satellite alone." Reconstruction of historical sea level is a huge scientific discipline and you would benefit from doing some more reading before beating a dead horse. The estimated uncertainty is large for a reason, but it does not encapsulate any scenarios where the observed change has been insignificant. If you think otherwise, I'd be happy to take your money for 2100 options on coastal real estate in about 90% of the world's coastline.
[1] — https://research.csiro.au/slrwavescoast/sea-level/measuremen... and https://link.springer.com/article/10.1007/s10712-011-9119-1
[2] — https://research.csiro.au/slrwavescoast/sea-level/measuremen...
[3] — https://www.ipcc.ch/report/ar6/wg1/downloads/report/IPCC_AR6... p.1287
As you quoted from the paper:
> The six main groups that provide satellite-altimetry-based GMSL estimates ...
1) You're restricting your attention to groups producing satellite-derived estimates.
2) Several of those groups, e.g. CSIRO, are using data assimilation to combine satellite estimates with gauges [1].
3) There are multiple satellites, often overlapping in time, often of totally different design/orbit/etc... [2]
4) Up to the most recent IPCC report (AR6), assessments were based on tide gauges alone [3]. For many of the reasons that you bring up. Hence "Nobody relies on estimates from a single satellite alone." Reconstruction of historical sea level is a huge scientific discipline and you would benefit from doing some more reading before beating a dead horse. The estimated uncertainty is large for a reason, but it does not encapsulate any scenarios where the observed change has been insignificant. If you think otherwise, I'd be happy to take your money for 2100 options on coastal real estate in about 90% of the world's coastline.
[1] — https://research.csiro.au/slrwavescoast/sea-level/measuremen... and https://link.springer.com/article/10.1007/s10712-011-9119-1
[2] — https://research.csiro.au/slrwavescoast/sea-level/measuremen...
[3] — https://www.ipcc.ch/report/ar6/wg1/downloads/report/IPCC_AR6... p.1287