Location of Radio-Frequency Interference Sources Using the SMAP L-Band Radiometer

被引：23

作者：

Soldo, Yan ^{[1
,2
]}

Le Vine, David M. ^{[1
]}

Bringer, Alexandra ^{[3
]}

de Matthaeis, Paolo ^{[1
,2
]}

Oliva, Roger ^{[4
]}

Johnson, Joel T. ^{[3
]}

Piepmeier, Jeffrey R. ^{[1
]}

机构：

[1] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[2] Univ Space Res Assoc, Columbia, MD 21046 USA

[3] Ohio State Univ, Dept Elect & Comp Engn, Columbus, OH 43210 USA

[4] European Space Agcy, European Space Astron Ctr, Madrid 20850, Spain

来源：

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 2018年 / 56卷 / 11期

关键词：

Radio frequency interference (RFI); Soil Moisture Active/Passive (SMAP); MICROWAVE RADIOMETER; DETECTION ALGORITHM; RFI DETECTION; MITIGATION; AQUARIUS; SMOS; PERFORMANCE; MISSION; SALINITY; OCEAN;

D O I：

10.1109/TGRS.2018.2844127

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The Soil Moisture Active/Passive (SMAP) satellite mission measures Earth's radiation in the protected portion of the spectrum at 1.413 GHz (L-band) to retrieve geophysical quantities of the surface, such as soil moisture and the frozen/thawed state of the soil. The presence of radio-frequency interference (RFI) in this band is significant and impacts the quality of SMAP measurements. Knowing the location of the sources of RFI is important, because it can help to identify the source itself and also be used to develop strategies to mitigate its impact of the RFI on the data. This paper presents an algorithm that takes advantage of the viewing geometry of SMAP to locate sources of RFI. The results are validated using known locations of RFI sources and by comparison with the measurements of Soil Moisture and Ocean Salinity (SMOS) and Aquarius, two other satellite missions with L-band microwave radiometers operating in the protected band. Comparison with RFI of known location suggests that the algorithm is accurate to 1-2 km. The median distance between the locations reported by SMOS and this algorithm is 2.27 km. A study of the relationship between the localization error and the number of observations of RFI sources shows that the median localization error is about 2 km with 12 observations and about 1 km with 30 observations.

引用

页码：6854 / 6866

页数：13

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