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Accurate determination and monitoring of sea-level changes are of fundamental value and crucial in understanding the ocean’s influence on our weather patterns and long-term climate change of our planet. For more than 30 years, satellite altimetry has been monitoring changes in sea level and climate, unequivocally, over regional to global scales with [mm/yr] accuracy and reliably, with respect to the center of mass of the Earth.

  • Fiducial Reference Measurements for Altimetry (FRM4ALT) are essential so that monitoring of the ocean and its changes is maintained:
  • Objective, continuous, homogeneous and reliable;
  • Free of errors and biases for any mission;
  • Uninterrupted and tied from one mission to the next.

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Frm4alt Int. Workshop

“International Review On Altimetry Cal/Val Activities and Applications"

23-26 April 2018,
Chania, Crete, Greece

FRM4ALT Workshop Flyer 2018


Transponder calibration

Transponder calibration at the CDN1 ESA Altimeter Calibration Site, for:

  • CryoSat-2 on 16-Aug-2016 at 21:23 UTC,
  • Tandem mission of Jason-2 and Jason-3  on 4-Aug-2016, 16:15 UTC,
  • Sentinel-3 took place on 26 July, 2016, 20:00 UTC,
  • Tandem mission of Jason-2 and Jason-3 took place on Monday 25 July, 2016, 18:16 UTC,
  • Tandem mission of Jason-2 and Jason-3 took place on Friday 15 July, 2016, 20:18 UTC,