On the joint estimation of model and satellite sea surface height anomaly errors
MetadataShow full item record
We describe a technique to estimate the error ®eld in the sea surface height (SSH) anomaly ®eld of an ocean model through the joint use of SSH anomaly ®elds measured from two satellites, Topex/Poseidon (T/P) and ERS-2. The joint error maps for the model, T/P and ERS-2 show distributions distinctly di erent from one another and globally inhomogeneous. Both sampling errors and instrument errors are represented in the mapped ®elds. Additionally, we compare the joint error estimation method to a technique using the model and only one satellite, and show the importance of the cross covariance between the measured SSH and the true SSH ®eld in the estimation of the error ®eld. Finally, we look at the distribution of the error versus the variance of the SSH at a location. This logged distribution suggests that the model errors are generally proportional to the model's variance (regression coe cient of 0.99, globally) while the satellites' errors do not exhibit this linear relationship (regression coe cients on the average of 0.60). The comparison of the two satellite distributions implies that ERS-2 has a lower sampling error than the T/P instrument except in the tropical region.
Showing items related by title, author, creator and subject.
Design considerations for the ORION satellite: structure, propulsion and attitude control subsystems for a small, general purpose spacecraft Boyd, Austin Walker (Monterey, California. Naval Postgraduate School, 1988-03);A general purpose satellite (ORION) has been designed which will launch from the Space Shuttle using a NASA Get-Away-Special (GAS) canister. The design is based on the use of a new extended GAS canister and a low profile ...
Shudde, Rex H. (Monterey, California. Naval Postgraduate School, 1989-09); NPS-55-89-10This report presents a satellite simulation written for the IBM PC and clones in Microsoft QuickBASIC 4.5. The program can either generate an ephemeris of satellite ground-track position and location with respect to a fixed ...
Preliminary PANSAT ground station software design and use of an expert system to analyze telemetry Lawrence, Gregory Wade (Monterey, California. Naval Postgraduate School, 1994-03);The Petite Amateur Navy Satellite (PANSAT) is a communications satellite designed to be used by civilian amateur radio operators. A master ground station is being built at the Naval Postgraduate School. This computer system ...