The 5cm vertical accuracy would be off the LIDAR (
AFAIK a sensor not carried by any operational RAF asset)
From the EA site I see they are using RADARSAT 2 to get cloud free imagery to update their mapping.
ASARS 2 imagery from the U-2 has been used in support of civil disaster monitoring, so presumably a similar application could be derived from the Sentinel product.
PS Just read this little gem from HMG regarding the use of servicemen to check flood defences:
Defence Secretary Philip Hammond has announced that more than 200 personnel from the Royal Navy, Army and RAF will be trained by the Environment Agency over the next week to act as
flood defence assessors.
"As we bring our troops back from Afghanistan and from Germany, we would like to see the military playing a bigger role in this kind of
homeland resilience task in the future."
So when you're trudging around the dykes in the p*ssing rain lads remember:
You are
"Flood defence assessors, playing your role in homeland resilience".
