Misra_IGARSS2011_SMOSRFI_072911_v2.ppt

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Domain Analysis of Radio Frequency Interference Detection Techniques for SMOS -Sidharth Misra and Christopher Ruf University of Michigan, Ann Arbor College of Engineering Department of Atmospheric, Oceanic & Space Sciences

Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Visibility Domain Detection Algorithm ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Tb Spatial Domain Detection Algorithms ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Visibility  Tb spatial comparison ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Tb Angular Domain Algorithm ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Tb Angular Domain Detection Algorithm, cont. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Tb Spatial vs. Tb Angular Domain RFI Detection Example #2 – Positive RFI Detection in Angular Domain

Tb Spatial vs. Tb Angular Domain RFI Detection Example #3 – Relative insensitivity to False Alarms over ocean in the angular domain Spatial domain Angular domain Island not falsely detected as RFI by Tb Angular algorithm

Tb Spatial vs. Tb Angular Domain RFI Detection Example #4 – Tb Angular domain can differentiate between RFI positives and RFI false alarms Spatial domain

Tb Spatial vs. Tb Angular Domain RFI Detection Example #5 – Relative insensitivity to False Alarms over land in the angular domain Lake not confused as RFI by Tb Angular algorithm Spatial domain Angular domain

Tb Spatial vs. Tb Angular Domain RFI Detection Example #6 – “Negative” RFI 235K RFI

Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

References ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

An 1800K RFI point source = 0.69K in the L1a domain, which is just above the detection threshold of the L1a algorithm and will be detected by both algorithms Visibility vs. Tb Spatial Domain RFI Detection Example #1 SM_OPER_MIR_SCLF1C_20100708T101059_20100708T110500_344_001_1 – snapshot id = 35740243

A 450K RFI point source = 0.17K in the L1a domain, which is below the detection threshold of the L1a algorithm Visibility vs. Tb Spatial Domain RFI Detection Example #2 SM_OPER_MIR_SCLF1C_20100708T101059_20100708T110500_344_001_1 – snapshot id = 35735541

Tb Spatial Domain Detection Algorithm Example #1: Indistinct RFI spot

Spatial domain Angular domain Tb Spatial vs. Tb Angular Domain RFI Detection Example #4 – Positive RFI Detection in Both Domains 450 K RFI spot, detectable by both algorithms

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Misra_IGARSS2011_SMOSRFI_072911_v2.ppt

1. Domain Analysis of Radio Frequency Interference Detection Techniques for SMOS -Sidharth Misra and Christopher Ruf University of Michigan, Ann Arbor College of Engineering Department of Atmospheric, Oceanic & Space Sciences

9. Tb Spatial vs. Tb Angular Domain RFI Detection Example #2 – Positive RFI Detection in Angular Domain

10. Tb Spatial vs. Tb Angular Domain RFI Detection Example #3 – Relative insensitivity to False Alarms over ocean in the angular domain Spatial domain Angular domain Island not falsely detected as RFI by Tb Angular algorithm

11. Tb Spatial vs. Tb Angular Domain RFI Detection Example #4 – Tb Angular domain can differentiate between RFI positives and RFI false alarms Spatial domain

12. Tb Spatial vs. Tb Angular Domain RFI Detection Example #5 – Relative insensitivity to False Alarms over land in the angular domain Lake not confused as RFI by Tb Angular algorithm Spatial domain Angular domain

13. Tb Spatial vs. Tb Angular Domain RFI Detection Example #6 – “Negative” RFI 235K RFI

14. Tb Angular Domain: RFI snapshot

15.

16.

17. Back-up Slides

18. An 1800K RFI point source = 0.69K in the L1a domain, which is just above the detection threshold of the L1a algorithm and will be detected by both algorithms Visibility vs. Tb Spatial Domain RFI Detection Example #1 SM_OPER_MIR_SCLF1C_20100708T101059_20100708T110500_344_001_1 – snapshot id = 35740243

19. A 450K RFI point source = 0.17K in the L1a domain, which is below the detection threshold of the L1a algorithm Visibility vs. Tb Spatial Domain RFI Detection Example #2 SM_OPER_MIR_SCLF1C_20100708T101059_20100708T110500_344_001_1 – snapshot id = 35735541

20. Tb Spatial Domain Detection Algorithm Example #1: Indistinct RFI spot

21. Spatial domain Angular domain Tb Spatial vs. Tb Angular Domain RFI Detection Example #4 – Positive RFI Detection in Both Domains 450 K RFI spot, detectable by both algorithms

Misra_IGARSS2011_SMOSRFI_072911_v2.ppt

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