********************************************************************** * * * I E R S B U L L E T I N - A * * * * Rapid Service/Prediction of Earth Orientation * ********************************************************************** 25 February 2010 Vol. XXIII No. 008 ______________________________________________________________________ GENERAL INFORMATION: To receive this information electronically, contact: ser7@maia.usno.navy.mil or use MJD = Julian Date - 2 400 000.5 days UT2-UT1 = 0.022 sin(2*pi*T) - 0.012 cos(2*pi*T) - 0.006 sin(4*pi*T) + 0.007 cos(4*pi*T) where pi = 3.14159265... and T is the date in Besselian years. TT = TAI + 32.184 seconds DUT1= (UT1-UTC) transmitted with time signals = +0.0 seconds beginning 11 March 2010 at 0000 UTC Beginning 1 January 2009: TAI-UTC(BIPM) = 34.000 000 seconds ********************************************************************** * As of Bulletin A Vol. XXIII, No. 008, on 25 February 2010, we have* * incorporated the new USNO VLBI solutions usno2010a and int2010a. * * The effect appears to be less than 0.1 mas in polar motion and * * 10 us in UT1-UTC. Also, a revised method of processing AAM * * data has been implemented. Users should see an improvement * * in the combination and short-term prediction of UT1-UTC * * for both the Bulletin and future rapid finals results. * ********************************************************************** ________________________________________________________________________ The contributed observations used in the preparation of this Bulletin are available at . The contributed analysis results are based on data from Very Long Baseline Interferometry (VLBI), Satellite Laser Ranging (SLR), the Global Positioning System (GPS) satellites, Lunar Laser Ranging (LLR), and meteorological predictions of variations in Atmospheric Angular Momentum (AAM). ________________________________________________________________________ COMBINED EARTH ORIENTATION PARAMETERS: IERS Rapid Service MJD x error y error UT1-UTC error " " " " s s 10 2 19 55246 -.02420 .00010 0.23513 .00009 0.066570 0.000011 10 2 20 55247 -.02511 .00009 0.23725 .00009 0.065196 0.000010 10 2 21 55248 -.02635 .00009 0.23914 .00009 0.063944 0.000008 10 2 22 55249 -.02750 .00010 0.24086 .00009 0.062823 0.000009 10 2 23 55250 -.02833 .00010 0.24258 .00009 0.061813 0.000008 10 2 24 55251 -.02918 .00009 0.24446 .00010 0.060838 0.000065 10 2 25 55252 -.03045 .00009 0.24665 .00011 0.059756 0.000055 _______________________________________________________________________ PREDICTIONS: The following formulas will not reproduce the predictions given below, but may be used to extend the predictions beyond the end of this table. x = 0.0849 - 0.1288 cos A + 0.0249 sin A + 0.0141 cos C - 0.1182 sin C y = 0.3460 + 0.0204 cos A + 0.1155 sin A - 0.1182 cos C - 0.0141 sin C UT1-UTC = 0.0569 - 0.00089 (MJD - 55260) - (UT2-UT1) where A = 2*pi*(MJD-55252)/365.25 and C = 2*pi*(MJD-55252)/435. TAI-UTC(MJD 55253) = 34.0 The accuracy may be estimated from the expressions: S x,y = 0.00068 (MJD-55252)**0.80 S t = 0.00025 (MJD-55252)**0.75 Estimated accuracies are: Predictions 10 d 20 d 30 d 40 d Polar coord's 0.004 0.007 0.010 0.013 UT1-UTC 0.0014 0.0024 0.0032 0.0040 MJD x(arcsec) y(arcsec) UT1-UTC(sec) 2010 2 26 55253 -0.0317 0.2485 0.05845 2010 2 27 55254 -0.0332 0.2505 0.05688 2010 2 28 55255 -0.0348 0.2525 0.05506 2010 3 1 55256 -0.0362 0.2543 0.05309 2010 3 2 55257 -0.0376 0.2562 0.05115 2010 3 3 55258 -0.0389 0.2581 0.04938 2010 3 4 55259 -0.0402 0.2599 0.04787 2010 3 5 55260 -0.0415 0.2618 0.04666 2010 3 6 55261 -0.0427 0.2637 0.04569 2010 3 7 55262 -0.0439 0.2657 0.04485 2010 3 8 55263 -0.0451 0.2676 0.04405 2010 3 9 55264 -0.0462 0.2696 0.04321 2010 3 10 55265 -0.0472 0.2715 0.04227 2010 3 11 55266 -0.0483 0.2735 0.04118 2010 3 12 55267 -0.0493 0.2755 0.03991 2010 3 13 55268 -0.0503 0.2775 0.03846 2010 3 14 55269 -0.0512 0.2796 0.03689 2010 3 15 55270 -0.0521 0.2816 0.03523 2010 3 16 55271 -0.0529 0.2837 0.03354 2010 3 17 55272 -0.0537 0.2857 0.03189 2010 3 18 55273 -0.0545 0.2878 0.03031 2010 3 19 55274 -0.0553 0.2899 0.02882 2010 3 20 55275 -0.0560 0.2920 0.02746 2010 3 21 55276 -0.0566 0.2941 0.02622 2010 3 22 55277 -0.0573 0.2962 0.02507 2010 3 23 55278 -0.0579 0.2984 0.02396 2010 3 24 55279 -0.0584 0.3005 0.02279 2010 3 25 55280 -0.0589 0.3026 0.02145 2010 3 26 55281 -0.0594 0.3048 0.01986 2010 3 27 55282 -0.0599 0.3070 0.01801 2010 3 28 55283 -0.0603 0.3091 0.01595 2010 3 29 55284 -0.0606 0.3113 0.01380 2010 3 30 55285 -0.0610 0.3135 0.01172 2010 3 31 55286 -0.0612 0.3156 0.00984 2010 4 1 55287 -0.0615 0.3178 0.00823 2010 4 2 55288 -0.0617 0.3200 0.00689 2010 4 3 55289 -0.0619 0.3222 0.00578 2010 4 4 55290 -0.0620 0.3244 0.00480 2010 4 5 55291 -0.0621 0.3266 0.00389 2010 4 6 55292 -0.0622 0.3288 0.00296 2010 4 7 55293 -0.0622 0.3309 0.00196 2010 4 8 55294 -0.0622 0.3331 0.00085 2010 4 9 55295 -0.0621 0.3353 -0.00040 2010 4 10 55296 -0.0620 0.3375 -0.00178 2010 4 11 55297 -0.0619 0.3397 -0.00327 2010 4 12 55298 -0.0617 0.3419 -0.00483 2010 4 13 55299 -0.0615 0.3440 -0.00641 2010 4 14 55300 -0.0613 0.3462 -0.00792 2010 4 15 55301 -0.0610 0.3484 -0.00933 2010 4 16 55302 -0.0607 0.3505 -0.01058 2010 4 17 55303 -0.0604 0.3527 -0.01167 2010 4 18 55304 -0.0600 0.3549 -0.01263 2010 4 19 55305 -0.0596 0.3570 -0.01352 2010 4 20 55306 -0.0591 0.3591 -0.01445 2010 4 21 55307 -0.0586 0.3613 -0.01550 2010 4 22 55308 -0.0581 0.3634 -0.01675 2010 4 23 55309 -0.0575 0.3655 -0.01823 2010 4 24 55310 -0.0569 0.3676 -0.01992 2010 4 25 55311 -0.0563 0.3697 -0.02172 2010 4 26 55312 -0.0556 0.3718 -0.02352 2010 4 27 55313 -0.0549 0.3738 -0.02518 2010 4 28 55314 -0.0542 0.3759 -0.02661 2010 4 29 55315 -0.0534 0.3779 -0.02776 2010 4 30 55316 -0.0526 0.3800 -0.02865 2010 5 1 55317 -0.0517 0.3820 -0.02936 2010 5 2 55318 -0.0509 0.3840 -0.02997 2010 5 3 55319 -0.0500 0.3860 -0.03055 2010 5 4 55320 -0.0490 0.3879 -0.03119 2010 5 5 55321 -0.0480 0.3899 -0.03192 2010 5 6 55322 -0.0470 0.3918 -0.03275 2010 5 7 55323 -0.0460 0.3938 -0.03369 2010 5 8 55324 -0.0450 0.3957 -0.03473 2010 5 9 55325 -0.0439 0.3976 -0.03581 2010 5 10 55326 -0.0427 0.3995 -0.03690 2010 5 11 55327 -0.0416 0.4013 -0.03793 2010 5 12 55328 -0.0404 0.4031 -0.03886 2010 5 13 55329 -0.0392 0.4050 -0.03965 2010 5 14 55330 -0.0379 0.4068 -0.04027 2010 5 15 55331 -0.0367 0.4085 -0.04074 2010 5 16 55332 -0.0354 0.4103 -0.04112 2010 5 17 55333 -0.0340 0.4120 -0.04150 2010 5 18 55334 -0.0327 0.4138 -0.04198 2010 5 19 55335 -0.0313 0.4155 -0.04264 2010 5 20 55336 -0.0299 0.4171 -0.04351 2010 5 21 55337 -0.0285 0.4188 -0.04456 2010 5 22 55338 -0.0270 0.4204 -0.04573 2010 5 23 55339 -0.0255 0.4220 -0.04690 2010 5 24 55340 -0.0240 0.4236 -0.04797 2010 5 25 55341 -0.0225 0.4252 -0.04884 2010 5 26 55342 -0.0210 0.4267 -0.04947 2010 5 27 55343 -0.0194 0.4282 -0.04986 2010 5 28 55344 -0.0178 0.4297 -0.05005 2010 5 29 55345 -0.0162 0.4311 -0.05012 2010 5 30 55346 -0.0145 0.4326 -0.05015 2010 5 31 55347 -0.0129 0.4340 -0.05023 2010 6 1 55348 -0.0112 0.4354 -0.05038 2010 6 2 55349 -0.0095 0.4367 -0.05065 2010 6 3 55350 -0.0078 0.4380 -0.05102 2010 6 4 55351 -0.0060 0.4393 -0.05150 2010 6 5 55352 -0.0043 0.4406 -0.05204 2010 6 6 55353 -0.0025 0.4419 -0.05260 2010 6 7 55354 -0.0007 0.4431 -0.05312 2010 6 8 55355 0.0011 0.4443 -0.05357 2010 6 9 55356 0.0030 0.4454 -0.05389 2010 6 10 55357 0.0048 0.4465 -0.05407 2010 6 11 55358 0.0067 0.4476 -0.05409 2010 6 12 55359 0.0085 0.4487 -0.05402 2010 6 13 55360 0.0104 0.4497 -0.05393 2010 6 14 55361 0.0123 0.4508 -0.05393 2010 6 15 55362 0.0142 0.4517 -0.05411 2010 6 16 55363 0.0162 0.4527 -0.05451 2010 6 17 55364 0.0181 0.4536 -0.05511 2010 6 18 55365 0.0201 0.4545 -0.05584 2010 6 19 55366 0.0220 0.4554 -0.05659 2010 6 20 55367 0.0240 0.4562 -0.05723 2010 6 21 55368 0.0260 0.4570 -0.05769 2010 6 22 55369 0.0280 0.4578 -0.05790 2010 6 23 55370 0.0300 0.4585 -0.05789 2010 6 24 55371 0.0320 0.4592 -0.05767 2010 6 25 55372 0.0340 0.4599 -0.05733 2010 6 26 55373 0.0360 0.4605 -0.05694 2010 6 27 55374 0.0380 0.4611 -0.05657 2010 6 28 55375 0.0400 0.4617 -0.05627 2010 6 29 55376 0.0421 0.4623 -0.05609 2010 6 30 55377 0.0441 0.4628 -0.05603 2010 7 1 55378 0.0462 0.4633 -0.05608 2010 7 2 55379 0.0482 0.4637 -0.05620 2010 7 3 55380 0.0503 0.4641 -0.05636 2010 7 4 55381 0.0523 0.4645 -0.05650 2010 7 5 55382 0.0544 0.4649 -0.05658 2010 7 6 55383 0.0564 0.4652 -0.05656 2010 7 7 55384 0.0585 0.4655 -0.05641 2010 7 8 55385 0.0605 0.4658 -0.05613 2010 7 9 55386 0.0626 0.4660 -0.05573 2010 7 10 55387 0.0647 0.4662 -0.05530 2010 7 11 55388 0.0667 0.4664 -0.05493 2010 7 12 55389 0.0688 0.4665 -0.05472 2010 7 13 55390 0.0708 0.4666 -0.05476 2010 7 14 55391 0.0728 0.4667 -0.05505 2010 7 15 55392 0.0749 0.4667 -0.05553 2010 7 16 55393 0.0769 0.4667 -0.05607 2010 7 17 55394 0.0790 0.4667 -0.05655 2010 7 18 55395 0.0810 0.4667 -0.05684 2010 7 19 55396 0.0830 0.4666 -0.05689 2010 7 20 55397 0.0850 0.4665 -0.05670 2010 7 21 55398 0.0870 0.4663 -0.05631 2010 7 22 55399 0.0890 0.4661 -0.05578 2010 7 23 55400 0.0910 0.4659 -0.05520 2010 7 24 55401 0.0930 0.4657 -0.05465 2010 7 25 55402 0.0949 0.4654 -0.05417 2010 7 26 55403 0.0969 0.4651 -0.05381 2010 7 27 55404 0.0988 0.4648 -0.05360 2010 7 28 55405 0.1008 0.4644 -0.05351 2010 7 29 55406 0.1027 0.4640 -0.05352 2010 7 30 55407 0.1046 0.4636 -0.05359 2010 7 31 55408 0.1065 0.4632 -0.05367 2010 8 1 55409 0.1084 0.4627 -0.05371 2010 8 2 55410 0.1103 0.4622 -0.05368 2010 8 3 55411 0.1122 0.4617 -0.05353 2010 8 4 55412 0.1140 0.4611 -0.05328 2010 8 5 55413 0.1158 0.4605 -0.05292 2010 8 6 55414 0.1177 0.4599 -0.05252 2010 8 7 55415 0.1195 0.4592 -0.05215 2010 8 8 55416 0.1212 0.4586 -0.05192 2010 8 9 55417 0.1230 0.4579 -0.05194 2010 8 10 55418 0.1248 0.4571 -0.05225 2010 8 11 55419 0.1265 0.4564 -0.05283 2010 8 12 55420 0.1282 0.4556 -0.05357 2010 8 13 55421 0.1299 0.4548 -0.05432 2010 8 14 55422 0.1316 0.4540 -0.05494 2010 8 15 55423 0.1332 0.4531 -0.05532 2010 8 16 55424 0.1349 0.4522 -0.05544 2010 8 17 55425 0.1365 0.4513 -0.05533 2010 8 18 55426 0.1381 0.4504 -0.05507 2010 8 19 55427 0.1397 0.4494 -0.05474 2010 8 20 55428 0.1412 0.4484 -0.05442 2010 8 21 55429 0.1428 0.4474 -0.05416 2010 8 22 55430 0.1443 0.4464 -0.05401 2010 8 23 55431 0.1458 0.4454 -0.05400 2010 8 24 55432 0.1473 0.4443 -0.05410 2010 8 25 55433 0.1487 0.4432 -0.05430 2010 8 26 55434 0.1501 0.4421 -0.05456 2010 8 27 55435 0.1515 0.4409 -0.05481 2010 8 28 55436 0.1529 0.4398 -0.05501 2010 8 29 55437 0.1542 0.4386 -0.05511 2010 8 30 55438 0.1556 0.4374 -0.05506 2010 8 31 55439 0.1569 0.4362 -0.05487 2010 9 1 55440 0.1582 0.4349 -0.05454 2010 9 2 55441 0.1594 0.4337 -0.05414 2010 9 3 55442 0.1606 0.4324 -0.05374 2010 9 4 55443 0.1618 0.4311 -0.05346 2010 9 5 55444 0.1630 0.4298 -0.05343 2010 9 6 55445 0.1641 0.4285 -0.05373 2010 9 7 55446 0.1653 0.4271 -0.05440 2010 9 8 55447 0.1664 0.4258 -0.05536 2010 9 9 55448 0.1674 0.4244 -0.05649 2010 9 10 55449 0.1685 0.4230 -0.05762 2010 9 11 55450 0.1695 0.4216 -0.05860 2010 9 12 55451 0.1705 0.4201 -0.05936 2010 9 13 55452 0.1714 0.4187 -0.05989 2010 9 14 55453 0.1723 0.4173 -0.06026 2010 9 15 55454 0.1732 0.4158 -0.06055 2010 9 16 55455 0.1741 0.4143 -0.06084 2010 9 17 55456 0.1750 0.4128 -0.06121 2010 9 18 55457 0.1758 0.4113 -0.06168 2010 9 19 55458 0.1766 0.4098 -0.06228 2010 9 20 55459 0.1773 0.4083 -0.06302 2010 9 21 55460 0.1780 0.4067 -0.06389 2010 9 22 55461 0.1787 0.4052 -0.06484 2010 9 23 55462 0.1794 0.4036 -0.06586 2010 9 24 55463 0.1800 0.4021 -0.06690 2010 9 25 55464 0.1806 0.4005 -0.06790 2010 9 26 55465 0.1812 0.3989 -0.06885 2010 9 27 55466 0.1818 0.3973 -0.06972 2010 9 28 55467 0.1823 0.3957 -0.07051 2010 9 29 55468 0.1828 0.3941 -0.07123 2010 9 30 55469 0.1832 0.3925 -0.07193 2010 10 1 55470 0.1837 0.3909 -0.07268 2010 10 2 55471 0.1841 0.3892 -0.07357 2010 10 3 55472 0.1844 0.3876 -0.07467 2010 10 4 55473 0.1848 0.3860 -0.07605 2010 10 5 55474 0.1851 0.3843 -0.07770 2010 10 6 55475 0.1854 0.3827 -0.07953 2010 10 7 55476 0.1856 0.3810 -0.08137 2010 10 8 55477 0.1858 0.3794 -0.08311 2010 10 9 55478 0.1860 0.3777 -0.08467 2010 10 10 55479 0.1862 0.3761 -0.08599 2010 10 11 55480 0.1863 0.3744 -0.08708 2010 10 12 55481 0.1864 0.3728 -0.08803 2010 10 13 55482 0.1865 0.3711 -0.08885 2010 10 14 55483 0.1865 0.3694 -0.08964 2010 10 15 55484 0.1865 0.3678 -0.09046 2010 10 16 55485 0.1865 0.3661 -0.09138 2010 10 17 55486 0.1865 0.3645 -0.09242 2010 10 18 55487 0.1864 0.3628 -0.09366 2010 10 19 55488 0.1863 0.3612 -0.09504 2010 10 20 55489 0.1861 0.3595 -0.09647 2010 10 21 55490 0.1860 0.3579 -0.09787 2010 10 22 55491 0.1858 0.3562 -0.09917 2010 10 23 55492 0.1856 0.3546 -0.10032 2010 10 24 55493 0.1853 0.3530 -0.10133 2010 10 25 55494 0.1850 0.3513 -0.10220 2010 10 26 55495 0.1847 0.3497 -0.10295 2010 10 27 55496 0.1844 0.3481 -0.10368 2010 10 28 55497 0.1840 0.3465 -0.10444 2010 10 29 55498 0.1837 0.3449 -0.10529 2010 10 30 55499 0.1832 0.3433 -0.10636 2010 10 31 55500 0.1828 0.3417 -0.10766 2010 11 1 55501 0.1823 0.3401 -0.10919 2010 11 2 55502 0.1818 0.3385 -0.11091 2010 11 3 55503 0.1813 0.3370 -0.11273 2010 11 4 55504 0.1808 0.3354 -0.11451 2010 11 5 55505 0.1802 0.3339 -0.11611 2010 11 6 55506 0.1796 0.3323 -0.11744 2010 11 7 55507 0.1790 0.3308 -0.11851 2010 11 8 55508 0.1783 0.3293 -0.11939 2010 11 9 55509 0.1776 0.3278 -0.12018 2010 11 10 55510 0.1769 0.3263 -0.12095 2010 11 11 55511 0.1762 0.3248 -0.12176 2010 11 12 55512 0.1755 0.3233 -0.12267 2010 11 13 55513 0.1747 0.3219 -0.12369 2010 11 14 55514 0.1739 0.3204 -0.12485 2010 11 15 55515 0.1731 0.3190 -0.12619 2010 11 16 55516 0.1722 0.3176 -0.12765 2010 11 17 55517 0.1714 0.3162 -0.12918 2010 11 18 55518 0.1705 0.3148 -0.13070 2010 11 19 55519 0.1696 0.3134 -0.13216 2010 11 20 55520 0.1686 0.3121 -0.13350 2010 11 21 55521 0.1677 0.3107 -0.13473 2010 11 22 55522 0.1667 0.3094 -0.13583 2010 11 23 55523 0.1657 0.3081 -0.13684 2010 11 24 55524 0.1647 0.3068 -0.13785 2010 11 25 55525 0.1637 0.3055 -0.13898 2010 11 26 55526 0.1626 0.3042 -0.14029 2010 11 27 55527 0.1615 0.3030 -0.14180 2010 11 28 55528 0.1605 0.3018 -0.14348 2010 11 29 55529 0.1593 0.3005 -0.14530 2010 11 30 55530 0.1582 0.2994 -0.14718 2010 12 1 55531 0.1571 0.2982 -0.14902 2010 12 2 55532 0.1559 0.2970 -0.15071 2010 12 3 55533 0.1547 0.2959 -0.15217 2010 12 4 55534 0.1535 0.2948 -0.15342 2010 12 5 55535 0.1523 0.2937 -0.15447 2010 12 6 55536 0.1511 0.2926 -0.15538 2010 12 7 55537 0.1499 0.2915 -0.15625 2010 12 8 55538 0.1486 0.2905 -0.15717 2010 12 9 55539 0.1473 0.2895 -0.15818 2010 12 10 55540 0.1461 0.2885 -0.15927 2010 12 11 55541 0.1448 0.2875 -0.16043 2010 12 12 55542 0.1435 0.2865 -0.16169 2010 12 13 55543 0.1421 0.2856 -0.16302 2010 12 14 55544 0.1408 0.2847 -0.16439 2010 12 15 55545 0.1395 0.2838 -0.16574 2010 12 16 55546 0.1381 0.2829 -0.16697 2010 12 17 55547 0.1367 0.2821 -0.16804 2010 12 18 55548 0.1354 0.2813 -0.16900 2010 12 19 55549 0.1340 0.2805 -0.16982 2010 12 20 55550 0.1326 0.2797 -0.17049 2010 12 21 55551 0.1312 0.2789 -0.17106 2010 12 22 55552 0.1297 0.2782 -0.17163 2010 12 23 55553 0.1283 0.2775 -0.17236 2010 12 24 55554 0.1269 0.2768 -0.17333 2010 12 25 55555 0.1254 0.2761 -0.17452 2010 12 26 55556 0.1240 0.2754 -0.17586 2010 12 27 55557 0.1225 0.2748 -0.17728 2010 12 28 55558 0.1211 0.2742 -0.17866 2010 12 29 55559 0.1196 0.2736 -0.17989 2010 12 30 55560 0.1181 0.2731 -0.18091 2010 12 31 55561 0.1167 0.2725 -0.18171 2011 1 1 55562 0.1152 0.2720 -0.18237 2011 1 2 55563 0.1137 0.2716 -0.18295 2011 1 3 55564 0.1122 0.2711 -0.18348 2011 1 4 55565 0.1107 0.2707 -0.18404 2011 1 5 55566 0.1092 0.2702 -0.18468 2011 1 6 55567 0.1077 0.2698 -0.18540 2011 1 7 55568 0.1062 0.2695 -0.18623 2011 1 8 55569 0.1048 0.2691 -0.18717 2011 1 9 55570 0.1033 0.2688 -0.18820 2011 1 10 55571 0.1018 0.2685 -0.18925 2011 1 11 55572 0.1003 0.2682 -0.19027 2011 1 12 55573 0.0988 0.2680 -0.19122 2011 1 13 55574 0.0973 0.2678 -0.19206 2011 1 14 55575 0.0958 0.2676 -0.19276 2011 1 15 55576 0.0943 0.2674 -0.19335 2011 1 16 55577 0.0928 0.2672 -0.19385 2011 1 17 55578 0.0913 0.2671 -0.19431 2011 1 18 55579 0.0898 0.2670 -0.19477 2011 1 19 55580 0.0883 0.2669 -0.19531 2011 1 20 55581 0.0869 0.2668 -0.19605 2011 1 21 55582 0.0854 0.2668 -0.19705 2011 1 22 55583 0.0839 0.2668 -0.19830 2011 1 23 55584 0.0825 0.2668 -0.19964 2011 1 24 55585 0.0810 0.2668 -0.20096 2011 1 25 55586 0.0795 0.2669 -0.20215 2011 1 26 55587 0.0781 0.2670 -0.20316 2011 1 27 55588 0.0767 0.2671 -0.20397 2011 1 28 55589 0.0752 0.2672 -0.20456 2011 1 29 55590 0.0738 0.2673 -0.20497 2011 1 30 55591 0.0724 0.2675 -0.20529 2011 1 31 55592 0.0710 0.2677 -0.20556 2011 2 1 55593 0.0696 0.2679 -0.20583 2011 2 2 55594 0.0682 0.2681 -0.20612 2011 2 3 55595 0.0668 0.2684 -0.20651 2011 2 4 55596 0.0655 0.2686 -0.20707 2011 2 5 55597 0.0641 0.2689 -0.20778 2011 2 6 55598 0.0628 0.2692 -0.20855 2011 2 7 55599 0.0614 0.2696 -0.20932 2011 2 8 55600 0.0601 0.2699 -0.21005 2011 2 9 55601 0.0588 0.2703 -0.21071 2011 2 10 55602 0.0575 0.2707 -0.21130 2011 2 11 55603 0.0562 0.2711 -0.21180 2011 2 12 55604 0.0549 0.2716 -0.21222 2011 2 13 55605 0.0536 0.2720 -0.21259 2011 2 14 55606 0.0524 0.2725 -0.21303 2011 2 15 55607 0.0512 0.2730 -0.21359 2011 2 16 55608 0.0499 0.2735 -0.21434 2011 2 17 55609 0.0487 0.2740 -0.21531 2011 2 18 55610 0.0475 0.2746 -0.21649 2011 2 19 55611 0.0464 0.2752 -0.21786 2011 2 20 55612 0.0452 0.2757 -0.21932 2011 2 21 55613 0.0440 0.2764 -0.22074 2011 2 22 55614 0.0429 0.2770 -0.22201 2011 2 23 55615 0.0418 0.2776 -0.22306 2011 2 24 55616 0.0407 0.2783 -0.22386 2011 2 25 55617 0.0396 0.2790 -0.22448 These predictions are based on all announced leap seconds. CELESTIAL POLE OFFSET SERIES: NEOS Celestial Pole Offset Series MJD dpsi error deps error (msec. of arc) 55233 -65.20 0.16 -6.04 0.18 55234 -65.14 0.18 -6.34 0.34 55235 -65.12 0.18 -6.56 0.34 55236 -65.24 0.18 -6.65 0.34 55237 -65.34 0.17 -6.69 0.34 55238 -65.26 0.17 -6.72 0.34 55239 -65.00 0.17 -6.64 0.34 IAU2000A Celestial Pole Offset Series MJD dX error dY error (msec. of arc) 55233 -0.216 0.064 -0.332 0.180 55234 -0.213 0.072 -0.323 0.340 55235 -0.203 0.072 -0.325 0.340 55236 -0.199 0.072 -0.332 0.340 55237 -0.200 0.068 -0.337 0.340 55238 -0.198 0.068 -0.351 0.340 55239 -0.184 0.068 -0.349 0.340 The recommended software to predict celestial pole offsets can be found at and software for the calculation of the dX and dY components with respect to IAU2000A Nutation/Precession Theory can be found at the web site in Chapter 5 Section 5.5 of the IERS Conventions.