Precise Near-Real-Time Sea Surface Height Measurements from the Jason-1 and Jason-2/OSTM Missions

Desai, S. D.; Haines, Bruce

doi:10.1080/01490419.2010.488968

Cited by 8 publications

(4 citation statements)

References 15 publications

(24 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Jason‐1 and Jason‐2 NRT SSH anomaly data was obtained from the Physical Oceanography Distributed Archive Center (PO.DAAC) at the NASA Jet Propulsion Laboratory [ Desai and Haines , 2010]. For Envisat data and for historical data from Jason‐1 cycles prior to cycle 292, SSH and sea surface roughness measurements were obtained from the Radar Altimeter Database System (RADS).…”

Section: Methodsmentioning

confidence: 99%

Could satellite altimetry have improved early detection and warning of the 2011 Tohoku tsunami?

Hamlington¹,

Leben²,

Godin³

et al. 2012

Geophysical Research Letters

View full text Add to dashboard Cite

[1] The 2011 Tohoku tsunami devastated Japan and affected coastal populations all around the Pacific Ocean. Accurate early warning of an impending tsunami requires the detection of the tsunami in the open ocean. While the lead-time was not sufficient for use in warning coastal populations in Japan, satellite altimetry observations of the tsunami could have been used to improve predictions and warnings for other affected areas. By comparing to both model results and historical satellite altimeter data, we use near-real-time satellite altimeter measurements to demonstrate the potential for detecting the 2011 Tohoku tsunami within a few hours of the tsunami being generated. We show how satellite altimeter data could be used to both directly detect tsunamis in the open ocean and also improve predictions made by models. Citation: Hamlington,

show abstract

Section: Methodsmentioning

confidence: 99%

Could satellite altimetry have improved early detection and warning of the 2011 Tohoku tsunami?

Hamlington¹,

Leben²,

Godin³

et al. 2012

Geophysical Research Letters

View full text Add to dashboard Cite

show abstract

“…Adding up other accumulated errors (i.e. orbit (Bosch 2004, Lemoine et al 2006, Desai and Haines 2010, Rudenko et al 2012, ionosphere, dry and wet troposphere (Menard et al 2003), etc) contribute to total noise in SSH measurements.…”

Section: Covariance Model Specification Guidance For Oceanographic Apmentioning

confidence: 99%

Data fusion of multisatellite altimetry for ocean tides modelling: a spatio-temporal approach with potential oceanographic applications

Fok

2015

International Journal of Image and Data Fusion

View full text Add to dashboard Cite

To cite this article: Hok Sum Fok (2015) Data fusion of multisatellite altimetry for ocean tides modelling: a spatio-temporal approach with potential oceanographic applications, International Journal of Image and Data Fusion, 6:3, 232-248, Nowadays, data combination/fusion is a common practice to integrate multiple data sources into a spatially and/or temporally regular data set for facilitating analysis and interpretation. Given the advancement in active remote sensing for monitoring our changing environment (no matter ocean, land or ice), the data acquisition from various spaceborne platforms with different spatio-temporal resolutions is enormous; calling for a need of multisatellite data combination. Instead of equally or spatially weighted solution, this article illustrates a spatio-temporal combination approach that weights data both in space and in time simultaneously for ocean tide modelling using multisatellite altimetry data sets under different spatial and temporal resolutions. The tide models generated from this approach show substantial improvement near coastal regions when compared to other contemporary ocean tide models by using independent pelagic and coastal tide gauges serving as ground truth. The discrepancy of the best model is~23%, three times larger than that of the deep ocean. Further improvement lies in more and better spatio-temporal observations in the near future. We anticipate this approach can be applied to other spatio-temporal data in a similar settings for spatio-temporal dependent unknown parameters, including geodetic, geophysical, oceanographic data and imagery under different spatial and temporal resolutions.

show abstract

“…The orbit determination as well as the radio occultation data processing must be performed in near‐real time (NRT) to allow use of the resulting data in near‐term weather forecast (Anthes, 2011). An increasing timeliness of precise orbit information is also desired in altimetry missions such as Sentinel‐3 or Jason‐1/2/CS, which aim at determination of the orbit height with few centimeter accuracy in less than a few hours (Desai & Haines, 2010; Roselló et al., 2012).…”

Section: Introductionmentioning

confidence: 99%

“…Representative NRT POD processes for selected radio occultation and altimetry missions are described in Andres et al. (2010) and Desai and Haines (2010)…”

Section: Introductionmentioning

confidence: 99%

Precise real‐time navigation of LEO satellites using GNSS broadcast ephemerides

Hauschild

Montenbruck

2021

Navigation

View full text Add to dashboard Cite

The availability of orbit information with high precision and low latency is a key requirement for many Earth‐observation missions, predominantly in the field of radio occultation. Traditionally, precise orbit determination solutions of low‐Earth orbit (LEO) satellites are obtained offline on ground after downloading GNSS measurements and auxiliary spacecraft data to the processing center. The latency of this processing depends on the frequency of LEO downlink contacts and the availability of precise GNSS orbit and clock products required for the orbit determination process. These dependencies can be removed by computing the precise orbit determination solution on board the satellite using GNSS broadcast ephemerides. In this study, both real data and simulated measurements from a representative LEO satellite are processed in a flight‐proven Kalman‐filter algorithm. The paper studies the use of GPS, Galileo and BeiDou‐3 for real‐time orbit determination in different combinations with simulated measurements. Results show that use of dual‐frequency observations and broadcast ephemerides of Galileo and BeiDou‐3 leads to a significant reduction of 3D rms orbit errors compared to GPS‐only processing. An onboard navigation accuracy of about one decimeter can be achieved without external augmentation data, which opens up new prospects for conducting relevant parts of the science data processing in future space missions directly on board a LEO satellite.

show abstract

Precise Near-Real-Time Sea Surface Height Measurements from the Jason-1 and Jason-2/OSTM Missions

Cited by 8 publications

References 15 publications

Could satellite altimetry have improved early detection and warning of the 2011 Tohoku tsunami?

Could satellite altimetry have improved early detection and warning of the 2011 Tohoku tsunami?

Data fusion of multisatellite altimetry for ocean tides modelling: a spatio-temporal approach with potential oceanographic applications

Precise real‐time navigation of LEO satellites using GNSS broadcast ephemerides

Contact Info

Product

Resources

About