[IGSREPORT-14790] Wk 1412 IGLOS Final Orbits
Gerd Gendt3
igsacc at gfz-potsdam.de
Thu Feb 15 23:23:56 PST 2007
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IGS Electronic Report 15 Feb 23:24:03 PST 2007 Message Number 14790
******************************************************************************
Author: AC Coordinator / GFZ Potsdam
sum-file Version 2.0
IGLOS Orbit Combination - Week 1412 (Jan 28, 2007 - Feb 03, 2007)
Contact: Gerd Gendt (gendt at gfz-potsdam.de)
Thomas Nischan ( nisn at gfz-potsdam.de)
COMBINATION STRATEGY:
---------------------
Ephemeris are combined as weighted averages computed over all centres.
Each centre and satellite is given a position weight computed from the centers
absolute deviation to the unweighted average orbit after removing small
differences in the reference frames. These weights were applied in a
second iteration to estimate Helmert transformation parameters for each
center. Finally the transformation parameters with respect to the combined
solution and the RMS of the fit are reported in Tables 2.1412.
For long arc computations the Earth Orientation Parameters (EOPs) are fixed to
the values of the final IGS (GPS) combination.
SOFTWARE:
---------
The weighted average software used was originally developed by T. Springer
and G. Beutler in 1993. The GPS long arc orbit analysis software used here for
individual centre ephemeris evaluation was developed by Beutler et al. at the
Astronomical Institute of the University of Bern (AIUB). For more details on
the orbit combination and complete references for both software see:
Beutler G., Kouba J. and T. Springer, 1995, Combining the orbits of the IGS
Analysis Centers, Bulletin Geodesique, 69, pp 200-222.
Kouba J., Mireault Y. and F. Lahaye, 1995, 1994 IGS Orbit/Clock Combination
and Evaluation, Appendix I of the Analysis Coordinator Report, International
GPS Service for Geodynamics (IGS) 1994 Annual Report, pp. 70-94.
Kouba J. and Y. Mireault, 1996, IGS Analysis Coordinator Report,
International GPS Service for Geodynamics (IGS) 1995 Annual Report,
pp. 45-76.
Kouba J. and Y. Mireault, 1997, Analysis Coordinator Report,
International GPS Service for Geodynamics (IGS) 1996 Annual Report,
pp. 55-100.
Weber R., 2000, IGS Technical Report 1999
PRODUCTS GENERATED:
-------------------
The combined IGL-ephemerides are written to daily files in the SP3-format.
The satellite accuracy codes in the header are based on the weighted rms.
for each satellite. Note, that the result files contain all satellites
that were analysed by at least one center. We refer to the 'REMARKS' section
below, in case a satellite or center was excluded from the combination.
The following naming convention is used for the result files:
igl1412[0-6].sp3 IGLOS-PP Glonass ephemerides files for days 0-6
of GPS Week 1412 in the SP3 format.
igl14127.sum Combination Report for GPS Week 1412.
REMARKS concerning the IGL Orbit Combination:
---------------------------------------------
1. Broadcast (brd) orbits and clocks are included in the combination for
statistics only.
2. Having only a few satellites the mcc orbits are included in the combination
for statistics only.
3. Starting on 01-May-2005 (GPS Week 1321; MJD 53491)[IGSMAIL-5151]
BKG, ESA, and CODE will start to refer their GLONASS orbit products
to the following satellite antenna offset (SAO) values:
X/Y/Z = 0.000/0.000/0.000 meter for GLONASS and
X/Y/Z = -0.545/0.000/0.000 meter for GLONASS-M SVs.
4. The satellite clock values in the combined orbit files are taken from the
broadcast files. The following gps/glonass time offsets derived from the
bkg summary files were added to the broadcast clocks.
Day | applied clock offset
----+---------------------
0 | 569.4 ns
1 | 640.5 ns
2 | 617.8 ns
3 | 645.9 ns
4 | 679.1 ns
5 | 686.5 ns
6 | 663.5 ns
5. The following orbit solutions were excluded from the combination
because they were biasing the weighted average (generally indicated
by long arc RMS).
Day | Centre | PRN list
----+--------+---------------
1 | ESX | R01 R23 R24
2 | ESX | R01 R23 R24
3 | ESX | R01 R23 R24
5 | ESX | R23
6 | ESX | R01 R23
ORBIT COMBINATION AND EVALUATION STATISTICS:
--------------------------------------------
Table 1 summarizes all statistics for the week. It contains means and standard
deviations over the week of satellite ephemeris and clock correction
transformation parameters for each centre (Tables 1.1412, 1a.1412).
Table 2 contains the complete ephemeris and clock correction transformation
parameters (includes both the apriori and a posteriori values) for each
centre and each day (Tables 2.1412.0-6)
Table 3 contains two types of daily RMS for each satellite and centre, along
with the computed satellite position sigmas for the combined orbits
(tables 3.1412.0-6).
The first type of satellite RMS is based on orbit combination and the
second RMS type is a result of the 7-day arc evaluation of each centre
ephemerides.
Table 1: Week 1412 summary. (Jan 28, 2007 - Feb 03, 2007)
Table 1.1412.a GPS week : 1412 MJD: 54128.0-54134.0
Mean and standard deviations of transformation parameters to the
combined IGL orbit.
WRMS - orbit RMS weighted by the SP3 header accuracy codes.
STA - Mean number of stations in the daily solutions.
CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS| TOFT TDRFT SDEV RMS
| [mm] [mm] [mm] [uas] [uas] [uas] [ppb] [mm] [mm]| [ps] [ps/d] [ps] [ps]
--------+----------------------------------------------------+------------------------------
bkg 56| 0 0 3 89 -13 -29 -.12 47 30 | 0 310 7012 7976
| 3 3 5 37 22 161 .11 | 0 1055
cod 170| -1 0 0 71 -34 22 -.16 44 35 | --- --- --- ---
| 3 2 3 56 70 158 .07 | --- ---
esx 43| -1 -1 -2 146 -46 186 -.46 197 106 | -266392 -3228 21790 34136
| 8 10 25 125 147 393 .10 | 501509 29906
iac n/a| 1 0 -2 -282 58 -20 .31 47 47 | 413538 904 162441 175443
| 2 3 10 27 46 112 .06 | 624189 26019
Table 1.1412.b GPS week : 1412 MJD: 54128.0-54134.0
Satellite position sigmas for the combined orbits
(coded in the IGS SP3 orbit files).
"E" flags eclipsing satellites.
Units: mm.
Day of GPS week
PRN | 0 1 2 3 4 5 6 | Remarks
------+------------------------------------+------------------------------------------
R01E | 29 ---- ---- ---- 0 0 305 |
R02E | 16 20 17 20 45 14 22 |
R03E | 30 45 118 89 36 21 22 |
R04E | 14 20 30 24 47 17 16 |
R06E | 17 36 31 22 43 19 17 |
R07E | 28 28 29 54 ---- ---- ---- |
R08E | 18 22 23 27 23 24 23 |
R18 | 25 37 46 26 49 24 25 |
R19 | 19 17 20 21 43 16 19 |
R21 | 17 36 36 30 49 15 58 |
R22 | 22 31 17 21 48 40 42 |
R23 | 48 35 32 29 19 31 45 |
R24 | 82 60 35 40 109 76 121 |
Table 1.1412.c GPS week : 1412 MJD: 54128.0-54134.0
Daily transformation of broadcast orbits (brd) to the combined IGL orbit.
Mean and standard deviations of the transformation parameters for the
whole gpsweek.
CEN WEEK DAY | DX DY DZ RX RY RZ SCL RMS WRMS| TOFT TDRFT SDEV RMS
| [mm] [mm] [mm] [uas] [uas] [uas] [ppb] [mm] [mm]| [ps] [ps/d] [ps] [ps]
-------------+----------------------------------------------------+------------------------------
brd 1412 0 | 0 0 -1 -7 0 -365 99.61 9 9 | 569416 0 0 0
brd 1412 1 | 0 0 -1 -5 -6 -386 83.62 7 7 | 640466 0 0 0
brd 1412 2 | 0 0 0 1 -3 -390 90.45 8 8 | 617768 0 0 0
brd 1412 3 | 0 0 0 0 -4 -353 76.47 7 7 | 645862 0 0 0
brd 1412 4 | 0 0 0 -3 -8 -388 81.80 7 7 | 679060 0 0 0
brd 1412 5 | 0 0 0 -6 -14 -402 77.63 6 6 | 686537 0 0 0
brd 1412 6 | 0 0 0 -5 -15 -375 82.66 7 7 | 663510 0 0 0
-------------+----------------------------------------------------+------------------------------
brd 1412 mean| 0 0 0 -4 -7 -380 84.61 7 7 | 643231 0 0 0
brd 1412 sdev| 0 0 0 3 5 16 8.03 0 0 | 40170 0 0 0
Table 2: Daily transformation of each centre to the combined IGL orbit and
clocks for each day of the week. The transformation displayed is the
sum of a priori and estimated transformations.
WRMS - RMS weighted by the centres SP3 header accuracy codes.
STA - Number of stations in the daily solutions.
Table 2.1412.0 GPS week: 1412 Day: 0 MJD: 54128
CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS| TOFT TDRFT SDEV RMS
| [mm] [mm] [mm] [uas] [uas] [uas] [ppb] [mm] [mm]| [ps] [ps/d] [ps] [ps]
--------+----------------------------------------------------+------------------------------
bkg 56| -5 6 4 133 -3 -167 -.21 57 41 | 0 602 3533 3666
cod 170| 2 -2 -3 183 -71 31 -.07 29 21 | --- --- --- ---
esx 43| 7 -6 -2 -2 68 35 -.44 162 59 | 12629 -22237 33855 60901
iac n/a| -2 2 0 -325 104 87 .35 39 39 | 589744 -17102 35548 66982
Table 2.1412.1 GPS week: 1412 Day: 1 MJD: 54129
CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS| TOFT TDRFT SDEV RMS
| [mm] [mm] [mm] [uas] [uas] [uas] [ppb] [mm] [mm]| [ps] [ps/d] [ps] [ps]
--------+----------------------------------------------------+------------------------------
bkg 56| -1 -2 -2 130 -13 -214 -.16 39 30 | 0 -524 4680 4906
cod 170| -1 2 0 1 1 157 -.07 46 37 | --- --- --- ---
esx 43| -2 7 8 129 -135 261 -.29 192 70 | 49300 10964 19998 41216
iac n/a| 1 0 4 -279 -12 156 .34 52 52 | 641318 21355 20143 41501
Table 2.1412.2 GPS week: 1412 Day: 2 MJD: 54130
CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS| TOFT TDRFT SDEV RMS
| [mm] [mm] [mm] [uas] [uas] [uas] [ppb] [mm] [mm]| [ps] [ps/d] [ps] [ps]
--------+----------------------------------------------------+------------------------------
bkg 56| 3 -4 -2 70 -7 27 -.14 38 32 | 0 -199 4014 4252
cod 170| 0 5 0 42 74 170 -.13 42 44 | --- --- --- ---
esx 43| -15 0 15 251 -209 -79 -.58 163 66 | 34377 -23251 16883 20134
iac n/a| 0 3 -8 -294 86 -63 .35 47 47 | -999999 -27043 999999 999999
Table 2.1412.3 GPS week: 1412 Day: 3 MJD: 54131
CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS| TOFT TDRFT SDEV RMS
| [mm] [mm] [mm] [uas] [uas] [uas] [ppb] [mm] [mm]| [ps] [ps/d] [ps] [ps]
--------+----------------------------------------------------+------------------------------
bkg 56| 1 -1 8 71 22 71 .10 35 26 | 0 141 2710 3134
cod 170| 0 -1 -1 66 20 80 -.20 35 34 | --- --- --- ---
esx 43| -10 8 17 92 -247 -204 -.42 161 69 | -999999 -4348 8468 15390
iac n/a| 2 -5 -20 -306 5 -172 .39 46 46 | 642679 -3325 8531 14832
Table 2.1412.4 GPS week: 1412 Day: 4 MJD: 54132
CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS| TOFT TDRFT SDEV RMS
| [mm] [mm] [mm] [uas] [uas] [uas] [ppb] [mm] [mm]| [ps] [ps/d] [ps] [ps]
--------+----------------------------------------------------+------------------------------
bkg 56| 0 3 12 80 -8 -199 -.15 32 25 | 0 -383 3398 3600
cod 170| -4 2 -1 58 -97 113 -.18 26 25 | --- --- --- ---
esx 43| 6 -22 -57 4 88 986 -.53 369 369 | -999999 44996 27290 40917
iac n/a| 3 -1 -10 -257 106 -102 .22 51 51 | 672977 32302 24261 40440
Table 2.1412.5 GPS week: 1412 Day: 5 MJD: 54133
CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS| TOFT TDRFT SDEV RMS
| [mm] [mm] [mm] [uas] [uas] [uas] [ppb] [mm] [mm]| [ps] [ps/d] [ps] [ps]
--------+----------------------------------------------------+------------------------------
bkg 56| 0 -2 3 28 -32 91 -.03 45 27 | 0 2552 27434 32612
cod 170| 0 -2 -5 51 -48 -166 -.24 50 35 | --- --- --- ---
esx 43| 3 -1 4 223 10 23 -.39 158 46 | 44972 -44595 32655 39690
iac n/a| 3 1 10 -251 60 -6 .26 40 40 | 697881 -27617 32054 41329
Table 2.1412.6 GPS week: 1412 Day: 6 MJD: 54134
CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS| TOFT TDRFT SDEV RMS
| [mm] [mm] [mm] [uas] [uas] [uas] [ppb] [mm] [mm]| [ps] [ps/d] [ps] [ps]
--------+----------------------------------------------------+------------------------------
bkg 56| 2 2 0 110 -48 184 -.22 82 31 | 0 -16 3316 3662
cod 170| -9 0 6 96 -122 -228 -.22 81 47 | --- --- --- ---
esx 43| -2 6 -1 323 99 284 -.54 174 61 | -6030 15869 13385 20704
iac n/a| 2 5 3 -265 57 -43 .30 54 54 | 650168 27762 16557 23019
Table 3: Daily fit for each satellite and each centre resulting from weighted
average combination and from long arc orbit dynamics (7-day). The
first IGL column gives resulting satellite accuracy measures found in
SP3 header. The last IGL column gives the RMS fit of the IGL orbit
when processed through the 7-day arc evaluation.
"E" stands for eclipsing satellites (earth).
"M" stands for eclipsing satellites (moon).
"X" stands for excluded from the statistics but included in IGL orbit.
"T" stands for Total long arc orbit RMS for all satellites.
"NE" stands for long arc orbit RMS for Non-Eclipsing satellites only.
"MEDI" stands for median of the centre's satellite RMS.
"MD"
Units: mm.
Table 3.1412.0 GPS week: 1412 Day: 0 MJD: 54128
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL
------+-------------------------------+---------------------------
R01E |12823 58 32 93 46 28 | 13 608 805 73 612
R02E | 6240 31 20 34 31 15 | 48 48 83 59 48
XR03E |25128 28 35 --- 57 30 | 73 61 --- 92 70
R04E | 4174 27 16 37 27 14 | 54 68 61 53 54
R06E |11300 21 23 40 35 16 | 27 29 34 41 21
R07E | 9690 45 31 76 60 28 | 23 38 60 58 53
R08E |17962 36 23 49 31 18 | 75 80 96 108 85
XR18 | 4421 33 18 80 --- 24 | 527 510 515 --- 519
R19 | 1996 45 19 65 19 18 | 61 48 65 51 49
R21 | 2630 30 15 81 20 17 | 41 47 102 26 28
R22 | 7008 29 18 114 21 21 | 60 63 101 51 54
R23 | 4794 58 23 261 51 47 | 62 59 224 57 56
R24 |13591 142 64 419 55 81 | 862 923 921 885 897
------+-------------------------------+---------------------------
RMS | 9689 57 29 162 39 |T 148 198 255 129 195
WRMS | 9689 41 21 59 39 |NE 268 275 321 214 267
MEDI | 7008 33 23 76 31 |MD 60 61 96 57 54
Table 3.1412.1 GPS week: 1412 Day: 1 MJD: 54129
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL
------+-------------------------------+---------------------------
R02E | 8343 28 31 58 35 19 | 34 62 119 68 47
XR03E |26420 34 53 --- 97 44 | 56 44 --- 124 61
R04E | 2909 28 21 65 37 19 | 91 100 92 83 88
R06E | 5074 19 48 79 97 35 | 28 29 58 41 22
R07E |10220 32 33 72 66 27 | 25 38 59 51 47
R08E |18444 26 33 47 50 21 | 92 56 119 110 83
R18 | 2035 33 49 168 44 37 | 383 380 375 362 380
R19 | 2404 13 24 75 19 16 | 50 45 76 37 40
R21 | 3812 29 35 179 33 35 | 34 35 148 34 28
R22 | 3093 35 42 129 37 30 | 47 43 88 46 35
R23 | 5224 46 28 352 67 34 | 42 58 187 91 45
R24 | 8329 90 101 424 46 59 | 744 717 718 742 729
------+-------------------------------+---------------------------
RMS | 7857 39 46 192 52 |T 135 133 214 149 133
WRMS | 7857 30 37 70 52 |NE 216 213 265 218 209
MEDI | 5074 29 33 79 44 |MD 47 45 119 68 47
Table 3.1412.2 GPS week: 1412 Day: 2 MJD: 54130
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL
------+-------------------------------+---------------------------
R02E |11377 25 33 30 29 17 | 34 59 112 52 45
XR03E |36406 156 92 --- 225 118 | 180 77 --- 285 121
R04E | 5148 37 54 42 65 30 | 40 64 61 71 48
R06E |10774 40 41 59 70 30 | 24 26 87 46 29
R07E | 7006 40 39 64 59 28 | 22 49 59 37 46
R08E |17591 28 41 48 42 22 | 57 51 83 82 61
R18 | 3647 61 43 188 25 46 | 353 355 328 318 346
R19 | 4837 29 38 58 16 19 | 33 49 74 21 31
R21 | 3494 33 46 133 46 35 | 52 60 83 38 31
R22 | 1911 26 29 43 25 17 | 46 48 109 32 32
R23 | 3018 18 50 314 58 32 | 56 62 217 33 46
R24 | 3452 54 47 353 45 35 | 734 789 692 776 762
------+-------------------------------+---------------------------
RMS | 8001 38 42 163 47 |T 135 140 173 149 133
WRMS | 8001 32 44 66 47 |NE 212 227 250 203 208
MEDI | 4837 33 41 59 45 |MD 46 59 87 46 46
Table 3.1412.3 GPS week: 1412 Day: 3 MJD: 54131
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL
------+-------------------------------+---------------------------
R02E |12887 34 29 45 34 19 | 30 63 183 55 48
XR03E |>>>>> 149 75 --- 151 88 | 208 93 --- 69 99
R04E | 8605 26 33 48 60 23 | 72 86 105 83 75
R06E | 6967 16 25 60 57 21 | 25 27 106 37 25
XR07E | 7084 --- --- 46 58 54 | --- --- 108 43 113
R08E |12936 49 49 56 32 27 | 75 56 102 76 66
R18 | 4662 35 28 95 39 26 | 171 186 219 209 182
R19 | 7429 28 16 60 48 20 | 39 34 117 51 30
R21 | 3012 24 19 128 52 30 | 49 47 129 84 39
R22 | 3194 25 26 68 37 20 | 62 51 93 57 51
R23 | 1361 24 45 313 52 29 | 83 87 193 67 74
R24 | 4889 66 55 342 36 39 | 546 599 667 576 569
------+-------------------------------+---------------------------
RMS | 7602 35 35 161 46 |T 123 120 183 117 114
WRMS | 7602 26 34 69 46 |NE 158 167 236 174 157
MEDI | 6967 28 29 60 48 |MD 72 63 117 67 66
Table 3.1412.4 GPS week: 1412 Day: 4 MJD: 54132
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL
------+-------------------------------+---------------------------
XR01E |14610 --- 10 --- --- 0 | --- 833 --- --- 833
R02E |11453 27 17 371 43 45 | 31 54 252 46 44
XR03E |>>>>> 54 49 --- 50 36 | 90 62 --- 51 56
R04E | 8826 30 27 389 37 47 | 56 51 223 43 42
R06E | 5899 26 15 362 30 43 | 34 25 212 38 30
XR08E | 9574 27 36 --- 31 22 | 53 31 --- 53 34
R18 | 4487 56 24 333 81 49 | 343 347 247 209 337
R19 |10594 22 36 331 54 43 | 32 38 254 57 31
R21 | 4377 22 23 394 59 48 | 51 65 325 30 50
R22 | 1460 24 30 394 34 47 | 33 29 257 43 26
XR23 | 2130 26 18 --- 35 18 | 90 70 --- 62 71
XR24 | 4634 183 164 --- 68 108 | 885 880 --- 830 855
------+-------------------------------+---------------------------
RMS | 7536 32 26 369 51 |T 154 207 252 132 200
WRMS | 7536 25 25 369 51 |NE 239 238 270 205 228
MEDI | 5899 27 24 371 43 |MD 53 54 252 51 44
Table 3.1412.5 GPS week: 1412 Day: 5 MJD: 54133
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL
------+-------------------------------+---------------------------
XR01E |15771 --- 11 --- --- 0 | --- 375 --- --- 376
R02E | 6703 17 24 19 28 13 | 28 39 93 38 28
XR03E |26381 20 26 --- 40 21 | 69 41 --- 40 42
R04E | 9165 18 38 39 25 17 | 40 56 161 48 44
R06E | 3501 29 31 59 25 19 | 29 50 114 26 29
R08E | 9017 26 49 64 39 24 | 48 65 73 76 52
R18 | 3650 26 49 63 40 24 | 414 415 492 320 415
R19 |10414 23 26 39 29 16 | 32 32 127 28 25
R21 | 6650 15 29 37 28 15 | 41 40 124 36 33
R22 | 2650 35 23 186 46 40 | 49 33 221 26 35
R23 | 2371 41 44 358 47 31 | 45 69 187 35 34
R24 | 8847 119 114 264 72 75 | 770 836 984 806 800
------+-------------------------------+---------------------------
RMS | 6924 45 50 158 40 |T 142 170 257 134 159
WRMS | 6924 27 35 46 40 |NE 225 237 355 208 223
MEDI | 6703 26 29 59 39 |MD 45 50 127 38 35
Table 3.1412.6 GPS week: 1412 Day: 6 MJD: 54134
Weighted Average Orbit Dynamics (7 days)
PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL
------+-------------------------------+---------------------------
XR01E |21142 --- 345 587 270 305 | --- 383 313 75 370
R02E | 3636 34 28 41 44 21 | 35 34 60 37 29
XR03E |28789 16 42 --- 31 22 | 73 41 --- 72 53
R04E | 8689 16 26 53 24 16 | 53 62 92 50 53
R06E |14174 29 31 31 26 17 | 25 38 80 51 29
R08E | 6963 28 54 51 28 22 | 89 66 116 86 72
R18 | 5277 35 53 64 29 24 | 536 529 515 375 532
R19 | 6981 22 38 62 17 18 | 31 42 103 32 30
R21 | 7633 24 77 258 58 57 | 37 90 152 34 40
R22 | 4103 42 35 188 40 41 | 31 43 137 34 32
R23 | 2395 60 62 309 67 44 | 63 90 203 56 50
R24 |10331 237 215 300 119 120 | 925 875 844 876 883
------+-------------------------------+---------------------------
RMS | 7761 82 81 174 54 |T 172 191 237 148 181
WRMS | 7761 31 47 61 54 |NE 270 278 325 234 261
MEDI | 6981 29 42 64 31 |MD 53 62 137 51 50
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