sec z について

平成 23 年 6 月 27 日(月) 電磁宇宙物理学研究室ゼミ
M2 名越遥
sec z について
1．はじめに
現在行っている再結合線観測において、アンテナ温度を得るためには sec z の値を知る
必要がある。今回は DOY134 における sec z の値を求めた。
2．算出した値など
真のアンテナ温度は以下の式で求められる。
Tsys = TRX + Tatm ⋅ t 0 ⋅ secz
このうち、sec z の値については観測のログファイル(.ang ファイル)から算出する必要
がある。
sec z は以下の式で求められる。
secz =
1
1
=
cos z cos(90 − EL)
算出した sec z の値と各 EL における Tsys 値を Table.1 に示す。また、Fig.1，2 に sec
z と Tsys との関係の一次関数プロットを表す。
1
Figure 1 Table.1 に示した sec z の値を用いた ch1 における Tsys との一次関数プロット
Figure 2 Table.1 に示した sec z の値を用いた ch2 における Tsys との一次関数プロット
2
Table.1 DOY134 2011 年 5 月 14 日に測定した各 EL 毎の Tsys 値
EL
z[rad]
secz
ch1
ch2
2
18.371
1.250162
3.172904
43.92042
51.4683
4
18.69
1.244594
3.120634
43.87174
51.34495
6
19.005
1.239097
3.070775
43.66165
51.24248
8
19.316
1.233669
3.023176
43.56516
51.14031
10
19.623
1.22831
2.9777
43.48497
51.03842
12
19.924
1.223057
2.934501
43.35709
50.93682
14
20.223
1.217838
2.892892
43.27742
50.85574
16
20.517
1.212707
2.853187
43.16623
50.81527
18
20.806
1.207663
2.815277
43.1187
50.69414
20
21.09
1.202706
2.779059
42.99229
50.59352
22
21.369
1.197837
2.744441
42.99229
50.49317
24
21.645
1.19302
2.711095
42.81931
50.4131
26
21.916
1.18829
2.679192
42.741
50.29333
28
22.182
1.183647
2.648657
42.70973
50.23359
30
22.443
1.179092
2.619418
42.66289
50.17396
32
22.699
1.174624
2.591412
42.55386
50.17396
34
22.95
1.170243
2.564578
42.50725
50.13426
36
23.196
1.16595
2.538859
42.50725
50.07479
38
23.438
1.161726
2.514101
42.49172
50.13426
40
23.673
1.157625
2.490559
42.41423
50.03521
42
23.905
1.153575
2.467787
42.3215
49.93643
44
24.129
1.149666
2.446229
42.29065
49.89699
46
24.349
1.145826
2.425456
42.22904
49.7986
48
24.564
1.142074
2.405526
42.19828
49.77896
50
24.774
1.138408
2.386406
42.10619
49.75932
52
24.978
1.134848
2.368152
41.9991
49.62219
54
25.176
1.131392
2.350727
41.9991
49.58311
56
25.369
1.128024
2.334015
41.96857
49.58311
58
25.555
1.124777
2.318156
41.98383
49.58311
60
25.737
1.121601
2.302869
41.87717
49.48559
62
25.912
1.118547
2.288381
41.80121
49.42721
64
26.083
1.115562
2.274419
41.87717
49.44666
66
26.246
1.112717
2.261287
41.81638
49.40777
68
26.405
1.109942
2.24864
41.84676
49.42721
3
70
26.558
1.107272
2.236618
41.75572
49.31074
72
26.703
1.104741
2.225359
41.77087
49.272
74
26.845
1.102263
2.214455
41.7103
49.29137
76
26.979
1.099924
2.204275
41.72543
49.29137
78
27.107
1.09769
2.194649
41.64984
49.29137
80
27.231
1.095526
2.185415
41.57444
49.21398
82
27.347
1.093501
2.176855
41.64984
49.25265
84
27.456
1.091599
2.168881
41.60458
49.15605
86
27.56
1.089784
2.161334
41.54433
49.15605
88
27.657
1.088091
2.154349
41.55938
49.11749
90
27.75
1.086467
2.147699
41.54433
49.13677
92
27.834
1.085001
2.141734
41.51425
49.13677
94
27.912
1.08364
2.136228
41.49923
49.05972
96
27.985
1.082366
2.131104
41.46919
49.09822
98
28.05
1.081231
2.126565
41.48421
49.02126
100
28.11
1.080184
2.122395
41.45419
49.04049
102
28.162
1.079277
2.118796
41.43919
49.04049
104
28.209
1.078456
2.115555
41.46919
49.02126
106
28.25
1.077741
2.112737
41.45419
49.02126
108
28.283
1.077165
2.110475
41.46919
49.02126
110
28.311
1.076676
2.10856
41.43919
49.04049
112
28.331
1.076327
2.107195
41.4242
48.98285
114
28.345
1.076083
2.106241
41.45419
48.98285
116
28.354
1.075926
2.105627
41.40921
49.00205
118
28.355
1.075908
2.105559
41.4242
49.00205
120
28.349
1.076013
2.105968
41.40921
49.00205
122
28.338
1.076205
2.106718
41.36431
48.94448
124
28.32
1.076519
2.107946
41.39424
48.98285
126
28.296
1.076938
2.109586
41.34935
48.96366
128
28.263
1.077514
2.111845
41.36431
48.96366
130
28.226
1.07816
2.114386
41.39424
49.04049
132
28.182
1.078928
2.117415
41.39424
49.00205
134
28.132
1.0798
2.120871
41.39424
48.96366
136
28.075
1.080795
2.124825
41.45419
49.02126
138
28.011
1.081912
2.129286
41.4242
48.98285
140
27.941
1.083134
2.134189
41.45419
49.00205
4
142
27.866
1.084443
2.139471
41.45419
49.02126
144
27.783
1.085892
2.145351
41.46919
49.07897
146
27.694
1.087445
2.151698
41.51425
49.11749
148
27.601
1.089068
2.158375
41.49923
49.09822
150
27.498
1.090866
2.165826
41.55938
49.11749
152
27.392
1.092716
2.173555
41.55938
49.11749
154
27.277
1.094723
2.182011
41.63475
49.17535
156
27.159
1.096782
2.190766
41.58951
49.21398
158
27.031
1.099016
2.200353
41.66494
49.17535
160
26.9
1.101303
2.210264
41.57444
49.21398
162
26.762
1.103711
2.220813
41.66494
49.21398
164
26.617
1.106242
2.232021
41.69517
49.272
166
26.467
1.10886
2.243751
41.7103
49.31074
168
26.311
1.111583
2.256097
41.74057
49.31074
170
26.151
1.114375
2.26892
41.74057
49.33013
172
25.981
1.117342
2.282724
41.80121
49.38834
174
25.808
1.120362
2.296967
41.83157
49.42721
176
25.629
1.123486
2.311913
41.81638
49.46612
178
25.444
1.126715
2.327591
41.90761
49.52456
180
25.253
1.130048
2.344028
41.93808
49.56358
182
25.057
1.133469
2.361165
41.95332
49.56358
184
24.855
1.136995
2.379121
42.02966
49.70048
186
24.648
1.140608
2.397838
42.06025
49.66131
188
24.437
1.14429
2.417255
42.09087
49.7397
190
24.218
1.148112
2.437778
42.1522
49.7986
192
23.994
1.152022
2.459172
42.19828
49.7986
194
23.766
1.156001
2.481376
42.18292
49.83793
196
23.533
1.160068
2.504526
42.29065
49.89699
198
23.292
1.164274
2.528974
42.36783
49.99566
200
23.049
1.168515
2.55416
42.42972
50.07479
202
22.799
1.172879
2.580649
42.50725
50.19383
204
22.546
1.177294
2.608072
42.56941
50.23359
206
22.287
1.181815
2.636809
42.61611
50.27341
208
22.024
1.186405
2.666703
42.66289
50.33321
210
21.754
1.191117
2.698165
42.7723
50.4131
212
21.481
1.195882
2.730803
42.8664
50.49317
5
214
21.203
1.200734
2.764926
42.99229
50.55334
216
20.92
1.205673
2.800618
43.03963
50.61362
218
20.634
1.210665
2.837708
43.13453
50.73448
220
20.341
1.215779
2.876814
43.18209
50.81527
222
20.045
1.220945
2.91751
43.30926
50.89626
224
19.744
1.226199
2.960172
43.45295
50.99774
226
19.439
1.231522
3.00478
43.50099
51.05877
228
19.13
1.236915
3.051454
43.61337
51.14031
230
18.816
1.242395
3.100486
43.75844
51.30393
232
18.5
1.24791
3.151545
43.85553
51.36548
234
18.179
1.253513
3.205265
43.93666
51.4889
236
17.85
1.259255
3.262365
44.03429
51.61274
238
17.519
1.265032
3.322016
44.14857
51.67482
240
17.19
1.270774
3.383622
44.34543
51.90337
242
16.851
1.276691
3.449658
44.51041
52.02863
244
16.508
1.282677
3.519278
44.70951
52.19633
246
16.165
1.288664
3.591897
44.90984
52.38591
248
15.816
1.294755
3.669066
45.07772
52.55525
250
15.462
1.300934
3.750949
45.33119
52.72538
252
15.104
1.307182
3.837712
45.51832
52.96059
254
14.746
1.31343
3.928742
45.75804
53.19731
256
14.384
1.319748
4.025451
45.9822
53.39212
258
14.018
1.326136
4.128364
46.27765
53.76289
260
13.646
1.332629
4.238682
46.55813
53.98272
262
13.275
1.339104
4.354925
46.85874
54.27043
264
12.899
1.345666
4.479622
47.17999
54.5156
266
12.521
1.352264
4.612601
47.50431
54.82995
268
12.134
1.359018
4.757402
47.85004
55.19242
270
11.751
1.365703
4.910172
48.1993
55.51241
6

Download Report