@article{PAR00007724,
  title = {{O}n the airborne spatial coverage requirement for microwave satellite validation},
  author = {{R}udiger, {C}. and {W}alker, {J}. {P}. and {K}err, {Y}ann},
  editor = {},
  language = {{ENG}},
  abstract = {{W}ith the recent launch of the {S}oil {M}oisture and {O}cean {S}alinity ({SMOS}) mission, the passive microwave remote-sensing community is currently planning and undertaking airborne validation campaigns. {G}iven the financial and logistical constraints on the size of validation area that can be covered by airborne simulators and the experiments underway that cover only a part of a satellite footprint, timely and scientifically sound advice on fractional footprint coverage requirements by campaigns for these low-resolution sensors is of paramount importance. {U}sing high-resolution airborne data from an extensive airborne campaign in {S}outheast {A}ustralia, the fractional coverage requirement for {L}-band passive microwave satellite missions is assessed using a subsampling technique of flight lines through a passive microwave footprint. {I}t is shown that minimum 50% coverage of the total footprint size will typically be required, given a spatial variability value of 20 {K} at 1-km resolution, to ensure that the footprint mean is estimated with an expected sampling error of less than 4 {K}, which is the design sensitivity of {SMOS}.},
  keywords = {{A}irborne validation ; passive microwave remote sensing ; {S}oil {M}oisture and {O}cean {S}alinity ({SMOS}) ; spatial requirements},
  booktitle = {},
  journal = {{I}eee {G}eoscience and {R}emote {S}ensing {L}etters},
  volume = {8},
  numero = {4},
  pages = {824--828},
  ISSN = {1545-598{X}},
  year = {2011},
  DOI = {10.1109/lgrs.2011.2116766},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00007724},
}