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- Author:
- R. van der Velde, et al. ; Cosh Michael H.; Y. Gao; A. Colliander; M.S. Burgin; J.P. Walker; E. Dinnat; C. Chae; M.H. Cosh; T.G. Caldwell; A. Berg; J. Martinez-Fernandez; M. Seyfried; P.J. Starks; D.D. Bosch; H. McNairn; Z. Su; Show all 17 Authors
- Source:
- Remote sensing of environment 2022 v.279 pp. 113113
- ISSN:
- 0034-4257
- Subject:
- algorithms; environment; land cover; microwave radiometers; models; roughness; satellites; soil water; temperature; time series analysis
- Abstract:
- ... L-band brightness temperature (TB) has been shown to provide the best sensitivity to soil moisture (SM) although C- and X-band based products offer a longer time-series from satellite-based measurements. Currently, global coverage SM is routinely produced from spaceborne measurements using all three frequency bands, but despite continued validation efforts of the products, the relative characteris ...
- Handle:
- 10113/7804738
- DOI:
- 10.1016/j.rse.2022.113113
- https://doi.org/10.1016/j.rse.2022.113113
2. Combined use of active and passive microwave satellite data to constrain a discrete scattering model
- Author:
- R. van der Velde, et al. ; L. Dente; P. Ferrazzoli; Z. Su; L. Guerriero; Show all 5 Authors
- Source:
- Remote sensing of environment 2014 v.155 pp. 222-238
- ISSN:
- 0034-4257
- Subject:
- data collection; grasslands; leaf area index; models; moderate resolution imaging spectroradiometer; radar; remote sensing; satellites; soil water; surface roughness; surface temperature; temporal variation; China
- Abstract:
- ... Emissivity and backscattering have different sensitivities to soil and vegetation parameters and provide complementary information on the observed scene. For this reason, the main objective of this study was to investigate the potential of the combined use of active and passive microwave signatures to improve the understanding of emission and scattering mechanisms over land. The discrete scatterin ...
- DOI:
- 10.1016/j.rse.2014.08.031
- https://doi.org/10.1016/j.rse.2014.08.031
- Author:
- R. Van Der Velde, et al. ; Rajat Bindlish; Michael Cosh; Thomas Jackson; Toshio Koike; Hideyuki Fujii; Steven Chan; Jun Asanuma; Aaron Berg; D. David Bosch; Todd Caldwell; Chandra Holifield Collins; Heather McNairn; Jose Martinez-Fernandez; John Prueger; Tracy Rowlandson; Mark Seyfried; Patrick Starks; Marc Thibeault; Jeffrey Walker; Evan Coopersmith; Show all 21 Authors
- Source:
- IEEE journal of selected topics in applied earth observations and remote sensing 2018 v.11 no.1 pp. 209-219
- ISSN:
- 1939-1404
- Subject:
- Earth Observing System; algorithms; data collection; mathematical models; microwave radiometers; model validation; remote sensing; satellite surveys; sensors (equipment); soil surface layers; soil water; temperature; vegetation cover
- Abstract:
- ... The Advanced microwave scanning radiometer 2 (AMSR2) is part of the global change observation mission-water (GCOM-W). AMSR2 has filled the gap in passive microwave observations left by the loss of the AMSR–earth observing system (AMSR-E) after almost ten years of observations. Both missions provide brightness temperature observations that are used to retrieve soil moisture estimates at the near sur ...
- Handle:
- 10113/6961205
- DOI:
- 10.1109/JSTARS.2017.2754293
- https://doi.org/10.1109/JSTARS.2017.2754293
- Author:
- R. van der Velde, et al. ; S.K. Chan; R. Bindlish; P. O'Neill; T. Jackson; E. Njoku; S. Dunbar; J. Chaubell; J. Piepmeier; S. Yueh; D. Entekhabi; A. Colliander; F. Chen; M.H. Cosh; T. Caldwell; J. Walker; A. Berg; H. McNairn; M. Thibeault; J. Martínez-Fernández; F. Uldall; M. Seyfried; D. Bosch; P. Starks; C. Holifield Collins; J. Prueger; J. Asanuma; M. Palecki; E.E. Small; M. Zreda; J. Calvet; W.T. Crow; Y. Kerr; Show all 33 Authors
- Source:
- Remote sensing of environment 2018 v.204 pp. 931-941
- ISSN:
- 0034-4257
- Subject:
- National Aeronautics and Space Administration; algorithms; correlation; ecosystems; freeze-thaw cycles; radar; remote sensing; satellites; soil water; temperature; uncertainty
- Abstract:
- ... Launched in January 2015, the National Aeronautics and Space Administration (NASA) Soil Moisture Active Passive (SMAP) observatory was designed to provide frequent global mapping of high-resolution soil moisture and freeze-thaw state every two to three days using a radar and a radiometer operating at L-band frequencies. Despite a hardware mishap that rendered the radar inoperable shortly after lau ...
- Handle:
- 10113/5819699
- DOI:
- 10.1016/j.rse.2017.08.025
- https://doi.org/10.1016/j.rse.2017.08.025
- Author:
- Ivar R. van der Velde, et al. ; Caroline B. Alden; John B. Miller; Luciana V. Gatti; Manuel M. Gloor; Kaiyu Guan; Anna M. Michalak; Ingrid T. van der Laan‐Luijkx; Danielle Touma; Arlyn Andrews; Luana S. Basso; Caio S. C. Correia; Lucas G. Domingues; Joanna Joiner; Maarten C. Krol; Alexei I. Lyapustin; Wouter Peters; Yoichi P. Shiga; Kirk Thoning; Thijs T. van Leeuwen; Vineet Yadav; Noah S. Diffenbaugh; Show all 22 Authors
- Source:
- Global change biology 2016 v.22 no.10 pp. 3427-3443
- ISSN:
- 1354-1013
- Subject:
- biomass; biosphere; carbon; carbon dioxide; climate; climate change; drought; dry season; ecosystems; geographical variation; global carbon budget; heat; models; primary productivity; satellites; seasonal variation; soil; temperature; tropical rain forests; wet season; Amazonia
- Abstract:
- ... Understanding tropical rainforest carbon exchange and its response to heat and drought is critical for quantifying the effects of climate change on tropical ecosystems, including global climate–carbon feedbacks. Of particular importance for the global carbon budget is net biome exchange of CO₂ with the atmosphere (NBE), which represents nonfire carbon fluxes into and out of biomass and soils. Suba ...
- DOI:
- 10.1111/gcb.13305
- https://doi.org/10.1111/gcb.13305
- Author:
- R. van der Velde, et al. ; A. Colliander; T.J. Jackson; R. Bindlish; S. Chan; N. Das; S.B. Kim; M.H. Cosh; R.S. Dunbar; L. Dang; L. Pashaian; J. Asanuma; K. Aida; A. Berg; T. Rowlandson; D. Bosch; T. Caldwell; K. Caylor; D. Goodrich; H. al Jassar; E. Lopez-Baeza; J. Martínez-Fernández; A. González-Zamora; S. Livingston; H. McNairn; A. Pacheco; M. Moghaddam; C. Montzka; C. Notarnicola; G. Niedrist; T. Pellarin; J. Prueger; J. Pulliainen; K. Rautiainen; J. Ramos; M. Seyfried; P. Starks; Z. Su; Y. Zeng; M. Thibeault; W. Dorigo; M. Vreugdenhil; J.P. Walker; X. Wu; A. Monerris; P.E. O'Neill; D. Entekhabi; E.G. Njoku; S. Yueh; Show all 49 Authors
- Source:
- Remote sensing of environment 2017 v.191 pp. 215-231
- ISSN:
- 0034-4257
- Subject:
- algorithms; radar; remote sensing; satellites; screening; soil water
- Abstract:
- ... The NASA Soil Moisture Active Passive (SMAP) mission has utilized a set of core validation sites as the primary methodology in assessing the soil moisture retrieval algorithm performance. Those sites provide well-calibrated in situ soil moisture measurements within SMAP product grid pixels for diverse conditions and locations. The estimation of the average soil moisture within the SMAP product gri ...
- Handle:
- 10113/5617486
- DOI:
- 10.1016/j.rse.2017.01.021
- https://doi.org/10.1016/j.rse.2017.01.021