Rotational Errors in IGS Orbit & ERP Products

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4. Inter‐compare IGS Polar Motion Series IGb00 (Ultra Observed –Final) PM Differences (Rapid –Final) PM Differences (4 Nov 2006) (~18 Mar 2008) IGS05/08 IGUs improved due to AC & combination changes dPM‐x dPM‐y • since ~2008, IGU & IGR agree better with each other than with IGS Finals • IGS Finals PM series shows low‐frequency systematic components • but more IGU high‐ frequency noise & some dPM‐y deviations in 2012 15
Differences Among IGS Polar Motion Series (Ultra Observed –Rapid) PM Differences • IGU & IGR more similar to each other than to Finals dPM‐x dPM‐y • subdaily ERP alias peaks imply not all ACs use IERS model (esp in IGUs) ! 16
Page 1 and 2: Rotational Errors in IGS Orbit & ER
Page 3 and 4: Compute Polar Motion Discontinuitie
Page 5 and 6: Spectra of Subdaily ERP Tide Model
Page 7 and 8: Simulated IERS ERP Tide Model Error
Page 9 and 10: Simulated ERP Errors vs Actual Orbi
Page 11 and 12: AC TRF & Orbit Frame Consistency
Page 13 and 14: AC TRF & Polar Motion Consistency
Page 15 and 16: 2008 ± 2009 ± 2010 ± 2011 ± Pai
Page 17 and 18: Compare IGR & IGS PPP Network Solut
Page 19: Compare IGR & IGS Long‐Arc Orbit
Page 23 and 24: 3 Cornered Hat PM Results with High
Page 25 and 26: Backup Slides

Rotational Errors in IGS Orbit & ERP Products

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