Value of Node Closest to HARVEST = 150 mm Value of Node Closest to SENETOSA = 117 mm Value of Node Closest to BURNIE = 154 mm SOUTH Mean = mm  = 10.9 mm TROPICS Mean = mm  = 11.4 mm NORTH Mean = mm  = 12.7 mm SOUTH Mean = mm  = 10.8 mm TROPICS Mean = mm  = 10.7 mm NORTH Mean = mm  = 12.0 mm Descending Tracks Ascending Tracks Jason-1 - T/P Sea Surface Height Formation Flying Phase (Jason-1 Cycles 1-21)

FROM SPACE TO SEASEA. Orbit (gravity field, tracking data, …). Range (bias, retracking, …). Corrections. Ionosphere. TMR vs. JMR. SSB. Other corrections Cal/Val and data consistency Toward a better consistency between father and son But also in terms of stability (models, instruments, …) In terms of bias Are we able to link altimetric missions at few mm and mm/yr level? With overlap phases RGDR 1&2 vs MGDR GDR-B vs GDR-A With small or large gaps

Local and global calibration/validation: part 1, Tuesday, March 13

Local and global calibration/validation: part 2, Wednesday, March 14

Linking different mission

Bias as a function of gap

Bias as a function of gap gdrb

Ascending tracksDescending tracks Harvest Corsica Bass Strait Radial orbit differences (mm) Jason-1: CNES POE (JGM3, SLR+DORIS) - JPL Reduced Dynamic (GRACE, GPS)

Bass Strait: Rate = –4.9 mm/yr Descending Tracks GDR Orbit — JPL GPS: Radial Rate for Cycles 1–90 –10100 mm/yr Harvest: Rate = –6.6 mm/yr Corsica: Rate = –0.5 mm/yr Ascending Tracks All Tracks Geographically Correlated Radial Orbit Error Rate

CNES Reprocessed RMS =5 mm RMS= 4 mm Ascending Tracks Descending Tracks All Tracks Repeat Cycles 76–87 CNES POE (GDR) RMS =9 mm RMS = 7 mm B. Haines Geographically Orbit Errors Revealed by GPS Orbits – mm

Jason-1: CNES POE (JGM3, SLR+DORIS) - JPL Reduced Dynamic (GRACE, GPS) Harvest Senetosa POE - GPS: ascending tracks Bass Strait POE - GPS: descending tracks Drift of Radial Orbit differences (mm/yr)

TOPEX/Poseidon: NASA - CNES POE

mm JMR - TMR During Formation Flying Phase Jason-1 GDR: Cycles 1-21 T/P MDGR + TMR Drift Correction: Cycles