Overview of the ICESat Mission

Schutz, B. E.; Zwally, H. Jay; Shuman, Christopher A.; Hancock, D. W.; Dimarzio, J. P.

doi:10.1029/2005gl024009

Cited by 728 publications

(540 citation statements)

References 9 publications

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“…Our study combines satellite stereo-image digital elevation model differencing (dDEM) with repeat-track laser altimetry from the Ice, Cloud and land Elevation Satellite (ICESat; Schutz et al, 2005), with the objective of providing an assessment of surface elevation change resolved at the scale of the major glacier catchments. We used stereo-image data from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER; Fujisada et al, 2005) and Satellite Pour l'Observation de la Terre 5 (SPOT5; Korona et al, 2009).…”

Section: Methodsmentioning

confidence: 99%

Detailed ice loss pattern in the northern Antarctic Peninsula: widespread decline driven by ice front retreats

Scambos¹,

Berthier

Haran³

et al. 2014

The Cryosphere

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Abstract. The northern Antarctic Peninsula (nAP, < 66 • S) is one of the most rapidly changing glaciated regions on earth, yet the spatial patterns of its ice mass loss at the glacier basin scale have to date been poorly documented. We use satellite laser altimetry and satellite stereo-image topography spanning 2001-2010, but primarily 2003-2008, to map ice elevation change and infer mass changes for 33 glacier basins covering the mainland and most large islands in the nAP. Rates of ice volume and ice mass change are 27.7 ± 8.6 km 3 a −1 and 24.9±7.8 Gt a −1 , equal to −0.73 m a −1 w.e. for the study area. Mass loss is the highest for eastern glaciers affected by major ice shelf collapses in 1995 and 2002, where twelve glaciers account for 60 % of the total imbalance. However, losses at smaller rates occur throughout the nAP, at both high and low elevation, despite increased snow accumulation along the western coast and ridge crest. We interpret the widespread mass loss to be driven by decades of ice front retreats on both sides of the nAP, and extended throughout the ice sheet due to the propagation of kinematic waves triggered at the fronts into the interior.

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Section: Methodsmentioning

confidence: 99%

Detailed ice loss pattern in the northern Antarctic Peninsula: widespread decline driven by ice front retreats

Scambos¹,

Berthier

Haran³

et al. 2014

The Cryosphere

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“…The reliability of ICESat altimetry data used for investigating water level changes of Tibetan lakes has been confirmed by comparing with hydrological station data, radar altimetry, and lake area data derived from optical images [1,2,7,21,22]. We obtained the ICESat Level-2 altimetry data (Release-33) during 2003-2009 from National Snow and Ice Data Center [3,10].…”

Section: Icesat Altimetry Datamentioning

confidence: 99%

“…One of the advantages of ICESat laser altimetry is the small footprint size with a diameter of ~70 m [10], which makes it an effective alternative to measure elevations of earth surface at a fine scale. However, the short temporal coverage of ICESat data (2003)(2004)(2005)(2006)(2007)(2008)(2009)) impedes the investigation of change trends of water level at a long timescale.…”

Section: Introductionmentioning

confidence: 99%

Combined ICESat and CryoSat-2 Altimetry for Accessing Water Level Dynamics of Tibetan Lakes over 2003–2014

Song

Sheng

et al. 2015

Water

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Long-term observations of lake water level are essential to our understanding of the evolution of Tibetan lake system. CryoSat-2 radar altimetry data over the Tibetan Plateau (2010Plateau ( -2014) is used to extend lake level measurements from ICESat laser altimetry (2003-2009, P1). This study evaluates the performance of CryoSat-2 data by comparing with gauge-based water levels that are calibrated by ICESat-observed water level time series, and quantifies the uncertainty of water-level change rate estimates from satellite altimetry measurements. We completely investigate the 131 lakes that were observed by both ICESat and CryoSat-2. The mean change rate of water level for all of examined lakes in P2 (0.19 ± 0.03 m·year -1 ) is slightly lower than that (0.21 ± 0.02 m·year -1 ) observed in P1. The extended lake level time series also indicates that, in the past few years, lakes in the Northern Changtang (especially in Hol Xil) showed accelerated growth; and that the extensive lake level rises north to the Gangdise Mountains, during 2003Mountains, during -2009, were found dampened during the CryoSat-2 observation period. The spatio-temporal heterogeneity of precipitation observed from weather stations can be used to partly explain the observed temporal pattern of lake level changes over different sub-zones of the plateau. OPEN ACCESSWater 2015, 7 4686

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“…However, the J2 zonal harmonic perturbation model is not suitable for missions with higher precision and reliability requirements. For example, missions like TOPEX/Poseidon (Aorpimai and Palmer 2007), ICESat (Schutz et al 2005), and TerraSAR-X/TanDEM-X (D'Errico 2013) require the groundtracks to be within a threshold of 1 km from the reference trace. The Chinese-French Oceanic Satellite (CFOSAT) (Xu and Huang 2014;Zhu et al 2015) currently under development has a stringent demand for the gridding division of the ground to enable precise mapping.…”

Section: -24mentioning

confidence: 99%

High-precision repeat-groundtrack orbit design and maintenance for Earth observation missions

Jia

et al. 2017

Celest Mech Dyn Astr

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The focus of this paper is the design and station keeping of repeat-groundtrack orbits for Sun-synchronous satellite. A method to compute the semimajor axis of the orbit is presented together with a station-keeping strategy to compensate for the perturbation due to the atmospheric drag. The results show that the nodal period converges gradually with the increase of the order used in the zonal perturbations up to J15. A differential correction algorithm is performed to obtain the nominal semimajor axis of the reference orbit from the inputs of the desired nodal period, eccentricity, inclination and argument of perigee. To keep the satellite in the proximity of the repeat-groundtrack condition, a practical orbit maintenance strategy is proposed in the presence of errors in the orbital measurements and control, as well as in the estimation of the semimajor axis decay rate. The performance of the maintenance strategy is assessed via the Monte Carlo simulation and the validation in a high fidelity model. Numerical simulations substantiate the validity of proposed mean-elements-based orbit maintenance strategy for repeat-groundtrack orbits.

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Overview of the ICESat Mission

Cited by 728 publications

References 9 publications

Detailed ice loss pattern in the northern Antarctic Peninsula: widespread decline driven by ice front retreats

Detailed ice loss pattern in the northern Antarctic Peninsula: widespread decline driven by ice front retreats

Combined ICESat and CryoSat-2 Altimetry for Accessing Water Level Dynamics of Tibetan Lakes over 2003–2014

High-precision repeat-groundtrack orbit design and maintenance for Earth observation missions

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