(ATBD) SMAP Level 1 Radar Data Products - NASA

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64 [13] F. Ulaby et al., Microwave Remote Sensing, Vol I, Addison-Wesley Publishing Co, 1981. [14] N. Pierdicca et al., “The Calibration of the Envisat Radar Altimeter Receiver by a Passive Technique,” IEEE Trans. on Geo. and Remote Sens., vol 44, no. 11, pp. 3297-3307, 2006. [15] I. Cumming and F. Wong, Digital Processing of Synthetic Aperture Radar Data, Artech House Inc., 2005. [16] J. E. Belz et al., “A Study of Radio Frequency Interference in the Space-to- Earth Exploration Allocation at L-Band,” Proceedings of the IEEE Aerospace Conference, Big Sky, MT, 2011. [17] S. Chan and M. Spencer, “RFI Study for the SMAP Radar,” Proceedings of the IEEE Radar Conference, Pasadena, CA, May, 2009.
Page 1 and 2:
Soil Moisture Active Passive (SMAP)
Page 3 and 4:
Algorithm Theoretical Basis Documen
Page 5 and 6:
i Contents 1 Introduction 1 2 Missi
Page 7 and 8:
1 1 Introduction This document desc
Page 9 and 10:
3 Table 1: SMAP Mission Requirement
Page 11 and 12:
Table 2: SMAP Data Products Table 5
Page 13 and 14:
7 Table 3: Requirements applicable
Page 15 and 16:
Figure 2: Flow of data in the SMAP
Page 17 and 18:
11 divided into two groups, a gener
Page 19 and 20: 13 positions in a half-orbit), and
Page 21 and 22: 15 Table 6: L1B antenna scan qualit
Page 23 and 24: 17 Table 10: L1C cell mode bit flag
Page 25 and 26: 19 the spacecraft velocity vector w
Page 27 and 28: Figure 4: Overlapping conical scans
Page 29 and 30: 23 hang out by 500 m thus broadenin
Page 31 and 32: 25 τ pri = n 1 f stalo (8) τ p =
Page 33 and 34: 27 and R(t) indicates that the rang
Page 35 and 36: Figure 7: Schematic view of the nad
Page 37 and 38: 31 from about 400 m in the side loo
Page 39 and 40: 33 cross-section is estimated from
Page 41 and 42: 35 Figure 8: L1C Processing flow di
Page 43 and 44: 37 adpative floating point quantize
Page 45 and 46: 39 7.7 Azimuth Compression The coni
Page 47 and 48: 41 Figure 12: Processed image (azim
Page 49 and 50: 43 8 L1B Processing Algorithms Low
Page 51 and 52: 45 9.1 Antenna Gain Pattern Knowled
Page 53 and 54: Figure 15: Plot of the total number
Page 55 and 56: 49 For SAR processing, the real ape
Page 57 and 58: 51 as the loop back measurement per
Page 59 and 60: 53 have been removed, there can sti
Page 61 and 62: 55 11 RFI RFI signals are expected
Page 63 and 64: 57 11.2.1 Backlobe Contamination GN
Page 65 and 66: 59 12.1 Pre-Launch Before launch, v
Page 67 and 68: 61 12.2.2 Radiometric Accuracy Vali
Page 69: 63 References [1] National Research
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(ATBD) SMAP Level 1 Radar Data Products - NASA

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