Uncertainties of the previous orbital solutions


From JPL Horizons, Jan 31 2011, Solution #60, #obs 738 (2005-2010 data arc)

 Date__(UT)__HR:MN     Delta        POS_3sigma    DOP_S_3sig  DOP_X_3sig RT_delay_3sig
                       [AU]         [arcsec]      [Hz]        [Hz]       [s]
...One-day intervals...
 2011-Nov-01 00:00     0.06331        5.2         0.72        2.59       0.000437
 2011-Nov-02 00:00     0.05530        6.0         0.72        2.57       0.000419
 2011-Nov-03 00:00     0.04732        7.0         0.71        2.55       0.000402
 2011-Nov-04 00:00     0.03938        8.5         0.71        2.53       0.000390
 2011-Nov-05 00:00     0.03147       10.6         0.70        2.50       0.000383
 2011-Nov-06 00:00     0.02359       14.2         0.69        2.47       0.000390
 2011-Nov-07 00:00     0.01574       21.1         0.68        2.42       0.000427
----------------------------------------------------------------------------------------
...One-hour intervals...
 2011-Nov-08 00:00     0.00800       40.3         0.63        2.24       0.000584
 2011-Nov-08 01:00     0.00769       41.8         0.62        2.22       0.000598
 2011-Nov-08 02:00     0.00739       43.4         0.61        2.20       0.000612
 2011-Nov-08 03:00     0.00708       45.0         0.61        2.18       0.000629
 2011-Nov-08 04:00     0.00678       46.8         0.60        2.15       0.000648
 2011-Nov-08 05:00     0.00647       48.7         0.59        2.12       0.000668
 2011-Nov-08 06:00     0.00617       50.8         0.58        2.08       0.000691
 2011-Nov-08 07:00     0.00587       52.9         0.57        2.03       0.000717
 2011-Nov-08 08:00     0.00557       55.3         0.55        1.98       0.000746
 2011-Nov-08 09:00     0.00527       57.8         0.54        1.92       0.000777
 2011-Nov-08 10:00     0.00497       60.5         0.52        1.85       0.000813
 2011-Nov-08 11:00     0.00467       63.3         0.49        1.76       0.000851
 2011-Nov-08 12:00     0.00438       66.3         0.46        1.66       0.000894
 2011-Nov-08 13:00     0.00409       69.4         0.43        1.53       0.000941
 2011-Nov-08 14:00     0.00381       72.5         0.38        1.37       0.000993
 2011-Nov-08 15:00     0.00354       75.5         0.33        1.17       0.001050
 2011-Nov-08 16:00     0.00328       78.2         0.26        0.92       0.001111
 2011-Nov-08 17:00     0.00304       80.3         0.17        0.61       0.001176
 2011-Nov-08 18:00     0.00281       81.5         0.08        0.30       0.001244
 2011-Nov-08 19:00     0.00261       81.4         0.14        0.49       0.001312
 2011-Nov-08 20:00     0.00243       79.9         0.31        1.10       0.001375
 2011-Nov-08 21:00     0.00229       77.6         0.52        1.87       0.001427
 2011-Nov-08 22:00     0.00219       76.2         0.77        2.75       0.001457
 2011-Nov-08 23:00     0.00214       77.8         1.03        3.67       0.001459
 2011-Nov-09 00:00     0.00214       83.0         1.27        4.54       0.001430
 2011-Nov-09 01:00     0.00219       90.1         1.47        5.26       0.001370
 2011-Nov-09 02:00     0.00229       96.3         1.62        5.79       0.001288
 2011-Nov-09 03:00     0.00242      100.0         1.71        6.11       0.001194
 2011-Nov-09 04:00     0.00260      100.9         1.75        6.26       0.001097
 2011-Nov-09 05:00     0.00280       99.5         1.76        6.29       0.001002
 2011-Nov-09 06:00     0.00302       96.5         1.74        6.23       0.000914
 2011-Nov-09 07:00     0.00326       92.5         1.71        6.13       0.000834
 2011-Nov-09 08:00     0.00352       88.2         1.68        6.00       0.000762
 2011-Nov-09 09:00     0.00379       83.7         1.64        5.86       0.000698
 2011-Nov-09 10:00     0.00407       79.3         1.60        5.71       0.000640
 2011-Nov-09 11:00     0.00436       75.1         1.56        5.57       0.000589
 2011-Nov-09 12:00     0.00466       71.1         1.51        5.42       0.000542
 2011-Nov-09 13:00     0.00495       67.5         1.47        5.27       0.000501
 2011-Nov-09 14:00     0.00526       64.1         1.44        5.14       0.000463
 2011-Nov-09 15:00     0.00556       61.0         1.40        5.01       0.000429
 2011-Nov-09 16:00     0.00588       58.1         1.36        4.88       0.000398
 2011-Nov-09 17:00     0.00618       55.5         1.33        4.77       0.000369
 2011-Nov-09 18:00     0.00649       53.1         1.30        4.66       0.000344
 2011-Nov-09 19:00     0.00680       50.9         1.27        4.56       0.000321
 2011-Nov-09 20:00     0.00711       48.9         1.25        4.47       0.000300
 2011-Nov-09 21:00     0.00742       47.0         1.23        4.38       0.000281
 2011-Nov-09 22:00     0.00772       45.2         1.20        4.31       0.000264
 2011-Nov-09 23:00     0.00804       43.6         1.18        4.23       0.000249
----------------------------------------------------------------------------------------
...One-day intervals...
 2011-Nov-10 00:00     0.00834       42.1         1.17        4.17       0.000235
 2011-Nov-11 00:00     0.01609       22.6         0.93        3.33       0.000111
 2011-Nov-12 00:00     0.02392       15.6         0.84        3.00       0.000097
 2011-Nov-13 00:00     0.03180       12.1         0.79        2.82       0.000094
 2011-Nov-14 00:00     0.03970       10.0         0.76        2.70       0.000093
 2011-Nov-15 00:00     0.04762        8.5         0.73        2.61       0.000094