The baseline difference between different theodolites
Xin Changjiang Lanzhou Observatory, Lanzhou Institute of Seismology,
China Earthquake Administration
AbstractSome observatories have been installed two theodolites in China since 2008, so they got two independent baselines
for one fluxgate variameter. We supposed the two baselines should keep same change in the beginning, but we found most observatories shown two baselines did not coincide in some degree after operating more than one year. The following graphs show the above facts:
21471. 821471. 921472
21472. 121472. 221472. 321472. 421472. 521472. 621472. 721472. 8
1 19 37 55 73 91 109 127 145 163 181 199 217 235 253 271 289 307 325 343
variameter-M15 made in Danmark, DB component, red for MINGEO theodolite made in Hungary, blue for MAG2KP made in Hungary
Lanzhou Observatory
219. 2
219. 4
219. 6
219. 8
220
220. 2
220. 4
1 19 37 55 73 91 109 127 145 163 181 199
variameter-M15 made in Danmark, DB component, red for CTM theodolite made in China, blue for MINGEO made in Hungary
Kashi Observatory
21417. 1
21417. 2
21417. 3
21417. 4
21417. 5
21417. 6
21417. 7
1 18 35 52 69 86 103 120 137 154 171 188 205 222 239 256
variameter-GM4 made in China, DB component, blue for CTM theodolite made in China, red for MINGEO made in Hungary
Qianling Observatory
21419. 221419. 321419. 421419. 521419. 621419. 721419. 821419. 921420
21420. 121420. 2
1 19 37 55 73 91 109 127 145 163 181 199
variameter-M15 made in Danmark, DB component, blue for CTM theodolite made in China, red for MINGEO made in Hungary
Qianling Observatory
21012. 821012. 921013
21013. 121013. 221013. 321013. 421013. 5
1 19 37 55 73 91 109 127 145 163 181 199
variameter-M15 made in Danmark, DB component, red for CTM theodolite made in China, blue for MINGEO made in Hungary
Changchun Observatory
21507. 221507. 321507. 421507. 521507. 621507. 721507. 821507. 921508
21508. 121508. 221508. 321508. 4
1 19 37 55 73 91 109 127 145 163 181 199
variameter-M15 made in Danmark, DB component, red for CTM theodolite made in China, blue for MINGEO made in Hungary
Chengdu Observatory
21365. 521365. 721365. 921366. 121366. 321366. 521366. 721366. 921367. 121367. 321367. 521367. 721367. 9
1 19 37 55 73 91 109 127 145 163 181 199 217
variameter-M15 made in Danmark, DB component, blue for CTM theodolite made in China, red for MINGEO made in Hungary
Wuhan Observatory
163. 5163. 7163. 9164. 1164. 3164. 5164. 7164. 9165. 1165. 3165. 5
1 19 37 55 73 91 109 127 145 163 181 199 217
variameter-M15 made in Danmark, DB component, blue for CTM theodolite made in China, red for MINGEO made in Hungary
Wulumuqi Observatory
20905. 520905. 720905. 920906. 120906. 320906. 520906. 720906. 920907. 120907. 320907. 5
1 19 37 55 73 91 109 127 145 163 181 199 217
variameter-M15 made in Danmark, DB component, blue for CTM theodolite made in China, red for MINGEO made in Hungary
Dedu Observatory
21303. 2
21303. 4
21303. 6
21303. 8
21304
21304. 2
21304. 4
1 19 37 55 73 91 109 127 145 163 181 199 217
variameter-GM4 made in Danmark, DB component, blue for CTM theodolite made in China, red for MINGEO made in Hungary
Mengcheng Observatory
DB:
30703
30704
30705
30706
30707
30708
30709
1 19 37 55 73 91 109 127 145 163 181 199 217 235 253 271 289 307 325 343
HB:
variameter-M15 made in Danmark, HB component, red for MINGEO theodolite (D 、 I) made in Hungary, blue for MAG2KP (D 、 I) made in Hungary, GSM magnetometer (F) made in Canada
Lanzhou Observatory
45474
45476
45478
45480
45482
45484
1 19 37 55 73 91 109 127 145 163 181 199
variameter-M15 made in Danmark, HB component, red for CTM theodolite (D 、 I) made in Hungary, blue for MINGEO (D 、 I) made in Hungary, GSM magnetometer (F) made in Canada
Kashi Observatory
31802
31803
31804
31805
31806
31807
31808
1 19 37 55 73 91 109 127 145 163 181 199 217 235 253
variameter-GM4 made in China, HB component, blue for CTM theodolite (D 、 I) made in China, red for MINGEO (D 、 I) made in Hungary, GSM magnetometer (F) made in Canada
Qianling Observatory
317583175931760317613176231763317643176531766317673176831769
1 19 37 55 73 91 109 127 145 163 181 199
variameter-M15 made in Danmark, HB component, blue for CTM theodolite (D 、 I) made in China, red for MINGEO (D 、 I) made in Hungary, GSM magnetometer (F) made in Canada
Qianling Observatory
2597325974259752597625977259782597925980
1 19 37 55 73 91 109 127 145 163 181 199
variameter-M15 made in Danmark, HB component, red for CTM theodolite (D 、 I) made in China, blue for MINGEO (D、 I) made in Hungary, GSM magnetometer (F) made in Canada
Changchun Observatory
341563415734158341593416034161341623416334164
1 19 37 55 73 91 109 127 145 163 181 199
variameter-M15 made in Danmark, HB component, red for CTM theodolite (D 、 I) made in China, blue for MINGEO (D 、 I) made in Hungary, GSM magnetometer (F) made in Canada
Chengdu Observatory
35010350113501235013350143501535016350173501835019350203502135022
1 19 37 55 73 91 109 127 145 163 181 199 217
variameter-M15 made in Danmark, HB component, blue for CTM theodolite (D 、 I) made in China, red for MINGEO (D 、 I) made in Hungary, GSM magnetometer (F) made in Canada
Wuhan Observatory
249032490424905249062490724908249092491024911
1 19 37 55 73 91 109 127 145 163 181 199 217
variameter-M15 made in Danmark, HB component, blue for CTM theodolite (D 、 I) made in China, red for MINGEO (D 、 I) made in Hungary, GSM magnetometer (F) made in Canada
Wulumuqi Observatory
2299822999230002300123002230032300423005230062300723008
1 19 37 55 73 91 109 127 145 163 181 199 217
variameter-M15 made in Danmark, HB component, blue for CTM theodolite (D 、 I) made in China, red for MINGEO (D 、 I) made in Hungary, GSM magnetometer (F) made in Canada
Dedu Observatory
4341843419434204342143422434234342443425
1 19 37 55 73 91 109 127 145 163 181 199 217 235 253 271 289 307 325 343
ZB:
45474
45476
45478
45480
45482
45484
1 19 37 55 73 91 109 127 145 163 181 199
variameter-M15 made in Danmark, ZB component, red for MINGEO theodolite (D 、 I) made in Hungary, blue for MAG2KP (D 、 I) made in Hungary, GSM magnetometer (F) made in Canada
Lanzhou Observatory
variameter-M15 made in Danmark, ZB component, red for CTM theodolite (D 、 I) made in Hungary, blue for MINGEO (D 、 I) made in Hungary, GSM magnetometer (F) made in Canada
Kashi Observatory
4126341264412654126641267412684126941270412714127241273
1 19 37 55 73 91 109 127 145 163 181 199 217 235 253
variameter-GM4 made in China, ZB component, blue for CTM theodolite (D 、 I) made in China, red for MINGEO (D 、 I) made in Hungary, GSM magnetometer (F) made in Canada
Qianling Observatory
41340413424134441346413484135041352413544135641358
1 19 37 55 73 91 109 127 145 163 181 199
variameter-M15 made in Danmark, ZB component, blue for CTM theodolite (D 、 I) made in China, red for MINGEO (D 、 I) made in Hungary, GSM magnetometer (F) made in Canada
Qianling Observatory
48218. 5
48219
48219. 5
48220
48220. 5
48221
48221. 5
1 19 37 55 73 91 109 127 145 163 181 199
variameter-M15 made in Danmark, ZB component, red for CTM theodolite (D 、 I) made in China, blue for MINGEO (D 、 I) made in Hungary, GSM magnetometer (F) made in Canada
Changchun Observatory
3709637097370983709937100371013710237103
1 19 37 55 73 91 109 127 145 163 181 199
variameter-M15 made in Danmark, ZB component, red for CTM theodolite (D 、 I) made in China, blue for MINGEO (D 、 I) made in Hungary, GSM magnetometer (F) made in Canada
Chengdu Observatory
35388353893539035391353923539335394353953539635397
1 19 37 55 73 91 109 127 145 163 181 199 217
variameter-M15 made in Danmark, ZB component, blue for CTM theodolite (D 、 I) made in China, red for MINGEO (D 、 I) made in Hungary, GSM magnetometer (F) made in Canada
Wuhan Observatory
50773
50774
50775
50776
50777
50778
50779
1 19 37 55 73 91 109 127 145 163 181 199 217
variameter-M15 made in Danmark, ZB component, blue for CTM theodolite (D 、 I) made in China, red for MINGEO (D 、 I) made in Hungary, GSM magnetometer (F) made in Canada
Wulumuqi Observatory
did not coincide perfectly in most observatories. Some baselines had difference in trend. Some existed inconsistent in some period. Especially the problem appeared in DB component. This problem meant the different theodolites produced different datum at the same observatory.
Thanks Pro. Yang,s group for providing baseline data.
Questions: On the base of above graphs, we observed two baselines measured by two theodolites for same component of a variameter in 2009