The beam width of the satellites is 300 mi. Assuming a round earth of 4,000 mi radius that means about an 2 3/4 mile difference in height from the center of the beam to the edge.
And from this a 3 cm difference in height is discernible? If enough assumptions are made I suppose it can be done.
Here are a few things to watch out for:
assumptions:
http://www.tos.org/oceanography/issues/ ... _et_al.pdf
density bumps:
http://jchemed.chem.wisc.edu/Journal/Is ... s1635.html
math:
http://www.climateaudit.org/?p=859
new satellite:
http://lightblueline.org/satellite-trac ... set-launch
TonyB (01:30:44) :
We are being bamboozled by science which likes to have a nice graph to explain everything, unfortunately the real world is more complicated than that. Global sea levels are -like global temperatures-a nonsensical artefact dreamt up in a computer laboratory.
The sea level calculations rely on an enormous number of variable factors including pressure, location, warmth of oceans, structures, storms, wave heights, surges, stasis, location of the gauge/sensor, slope of the underlying strata etc. The accuracy of measurements is said to be 3cm (10 times the level of the alleged annual rise) but in reality is far vaguer than that because of the inherent difficulties of measuring.
Both the following two sites give a good description of the process-which is being constantly refined but doesn’t get more accurate as the inherent flaws in measuring capabilities can’t be resolved.
http://www.tos.org/oceanography/issues/ ... _et_al.pdf
http://jchemed.chem.wisc.edu/Journal/Is ... s1635.html
The following site deals with problems of the data;
http://www.climateaudit.org/?p=859
This with reliability;
http://lightblueline.org/satellite-trac ... set-launch
http://wattsupwiththat.com/2009/06/30/r ... ms-bubkes/