Rahmstorf is a real piece of work. When it comes to global sea level, he happily chucked the tide gauge data and instead used the 1992-2005 subset of the satellite data. But when it comes to local sea level data like the northeastern US, he happily ignores the satellite data and sticks religiously to tide gauge data.
But it is worse than it seems. When calculating future sea level rise, he ignores both the tide gauge data and the satellite data, and instead just makes numbers up. Never mind that none of the data sources show a positive acceleration in sea level rise rates. He knows that all hell is about to break loose.