109:
35:
The main advantage of the STAR architecture is that it requires no mechanical scanning of an antenna. Using a static antenna simplifies the antenna system dynamics and improves the time-bandwidth product of the radiometer. Furthermore, aperture thinning reduces the overall volume and mass of the
31:
of the brightness temperature map of the scene, and the scene itself is reconstructed by inverting the sampled transform. The reconstructed image includes all of the pixels in the entire field-of-view of the antennas.
27:
in which the coherent product (correlation) of the signal from pairs of antennas is measured at different antenna-pair spacings (baselines). These products yield sample points in the
54:
80:
36:
antenna system. A disadvantage is the reduction of radiometric sensitivity (or increase in rms noise) of the image due to a decrease in
146:
170:
40:
for each measurement compared to a filled aperture. Pixel averaging is required for good radiometric sensitivity.
81:
Synthetic
Thinned Aperture Radiometry (STAR) Technologies Enabling 10-km Soil Moisture Remote Sensing from Space
60:
175:
139:
37:
132:
28:
116:
165:
159:
96:
systems, IEEE Trans. Geosci. Remote
Sensing, vol. 37, no. 12, pp. 2228-2236, 1999.
49:
108:
93:
83:, Proc. NASA Earth Science Technology Conference, (College Park, MD), 2002.
24:
120:
55:
Microwave
Imaging Radiometer with Aperture Synthesis
140:
8:
147:
133:
57:(MIRAS), an example of a spaceborne STAR
72:
17:Synthetic thinned aperture radiometry
7:
105:
103:
79:Piepmeier, J.R.; Pellerano, F.A.;
119:. You can help Knowledge (XXG) by
92:D. M. Le Vine, Synthetic aperture
14:
107:
1:
192:
115:This science article is a
102:
171:Synthetic aperture radar
61:Synthetic aperture radar
38:signal-to-noise ratio
128:
127:
29:Fourier transform
23:) is a method of
183:
149:
142:
135:
111:
104:
97:
90:
84:
77:
191:
190:
186:
185:
184:
182:
181:
180:
156:
155:
154:
153:
101:
100:
91:
87:
78:
74:
69:
46:
12:
11:
5:
189:
187:
179:
178:
173:
168:
158:
157:
152:
151:
144:
137:
129:
126:
125:
112:
99:
98:
85:
71:
70:
68:
65:
64:
63:
58:
52:
45:
42:
13:
10:
9:
6:
4:
3:
2:
188:
177:
176:Science stubs
174:
172:
169:
167:
164:
163:
161:
150:
145:
143:
138:
136:
131:
130:
124:
122:
118:
113:
110:
106:
95:
89:
86:
82:
76:
73:
66:
62:
59:
56:
53:
51:
48:
47:
43:
41:
39:
33:
30:
26:
22:
18:
121:expanding it
114:
88:
75:
34:
20:
16:
15:
50:Beamforming
160:Categories
94:radiometer
67:References
44:See also
166:Radar
25:radar
117:stub
21:STAR
162::
148:e
141:t
134:v
123:.
19:(
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
