IVS Analysis Report for AOV023 ($18MAY21XA) This report is the official IVS analysis report that corresponds to the database maintained by the IVS Data Centers for this session. (Analyzed by David Gordon, Goddard Space Flight Center. Spoolfile source: interactive solve/nuSolve analysis.) Problems: There are many problems with this session. The databases from GSI contain several access codes that interfere with the Calc/Solve processing and nuSolve analysis. These had to be removed by regenerating them with dbedit. New version 1 databases were submitted to IVS. The results are very poor. Both bands are noisy. At S-band, the SNR's are low and 27% of the observations are non-detections (zero quality codes). The solution actually gets noisier when the ionosphere is applied. Scheduled scans were too short, some as short as 20 seconds, which is way too short for the antennas involved. And typically several seconds are lost during correlation, so observations are as short as 14 seconds. The emphasis needs to be on getting quality data, not just more data. Parameterization comments: Three clock breaks used at KASHIM11, at 19:29, 21:06, and 23:31. Other comments: None. ----------------------------------------- Session Statistics Observations: 7649 scheduled 7554 correlated (in database) 5418 recoverable (usable) 5200 used Session fit: 74.934 ps ----------------------------------------- Station Performance Number of Observations Scheduled Recoverable* Used % of scheduled obs used HOBART26 1846 1493 1476 80.0% ISHIOKA 2545 2140 2099 82.5% KASHIM11 2460 2060 1941 78.9% KOGANEI 2323 543 496 21.4% VERAMZSW 2090 1531 1452 69.5% WARK12M 1959 1457 1441 73.6% YARRA12M 2075 1612 1495 72.0% --------------- --------- ----------- --------- ------ Station Total** 7649 5418 5200 68.0% * Recoverable: can be included in the solution. ** Total includes distinct observations only. MISSED: Station was scheduled, but it did not observe. NOT CORR: Station was scheduled but not correlated. NOT USED: Usable data was generated for this station, but the analyst rejected it all. ----------------------------------------- Source Performance Number of Observations Scheduled Correlated* Used % of scheduled obs used 1741-038 294 293 197 67.0% 1936-155 339 336 242 71.4% 2008-159 113 110 75 66.4% 3C446 359 355 255 71.0% 1156+295 233 222 144 61.8% 1921-293 42 42 39 92.9% 0016+731 133 130 75 56.4% 1424-418 189 187 140 74.1% 0059+581 83 81 49 59.0% 1334-127 274 273 184 67.2% 1546+027 242 240 155 64.0% 0800+618 90 90 41 45.6% 2052-474 38 38 35 92.1% 1657-261 205 204 99 48.3% 0133+476 91 89 57 62.6% 1255-316 43 43 36 83.7% 1057-797 87 87 85 97.7% 1849+670 91 91 48 52.7% 0308-611 24 24 22 91.7% 1128+385 113 112 83 73.5% 0104-408 162 157 111 68.5% 1030+415 132 130 104 78.8% 2227-088 327 319 220 67.3% 0017+200 308 306 220 71.4% 1803+784 163 160 108 66.3% 1759-396 42 42 40 95.2% 3C418 82 82 76 92.7% 1954-388 42 42 36 85.7% 0131-522 31 31 27 87.1% 0202+319 174 172 108 62.1% NRAO150 95 92 73 76.8% 0402-362 139 139 92 66.2% 0229+131 83 83 61 73.5% 0454-234 311 309 227 73.0% 0552+398 187 186 128 68.4% CTA26 234 231 162 69.2% 0642+449 39 39 36 92.3% 0458-020 313 305 205 65.5% 0700-197 118 117 79 66.9% 0834-201 306 303 116 37.9% 0748+126 328 325 218 66.5% 0727-115 302 301 228 75.5% OJ287 319 312 232 72.7% 1149-084 329 324 232 70.5% ------------ --------- ---------- ------ ------ Source Total 7649 7554 5200 68.0% * Correlated: included in database ----------------------------------------- Baseline Performance Number of Observations Scheduled Recoverable* Used % of scheduled obs used HOBART26-ISHIOKA 288 258 258 89.6% HOBART26-KASHIM11 264 234 231 87.5% HOBART26-KOGANEI 263 40 40 15.2% HOBART26-VERAMZSW 208 179 177 85.1% HOBART26-WARK12M 426 404 399 93.7% HOBART26-YARRA12M 397 378 371 93.5% ISHIOKA-KASHIM11 591 570 552 93.4% ISHIOKA-KOGANEI 503 225 216 42.9% ISHIOKA-VERAMZSW 483 477 465 96.3% ISHIOKA-WARK12M 321 275 275 85.7% ISHIOKA-YARRA12M 359 335 333 92.8% KASHIM11-KOGANEI 512 237 218 42.6% KASHIM11-VERAMZSW 469 454 442 94.2% KASHIM11-WARK12M 292 250 246 84.2% KASHIM11-YARRA12M 332 315 252 75.9% KOGANEI-VERAMZSW 425 32 17 4.0% KOGANEI-WARK12M 292 1 DESELECTED 0.0% KOGANEI-YARRA12M 328 8 5 1.5% VERAMZSW-WARK12M 237 170 169 71.3% VERAMZSW-YARRA12M 268 219 182 67.9% WARK12M-YARRA12M 391 357 352 90.0% ----------------- --------- ----------- ---------- ------ Baseline Total 7649 5418 5200 68.0% * Recoverable: can be included in the solution. MISSED: Baseline was scheduled, but at least one of the sites did not observe. NOT CORR: Baseline was scheduled but not correlated. NO DATA: The baseline's stations were both correlated, but they did not observe together. DESELECTED: Usable data was generated for the baseline, but the analyst rejected it.