[IGSREPORT-24231] Wk 1882 GRG Analysis report

igs-ac at cls.fr igs-ac at cls.fr
Thu Feb 11 10:01:07 PST 2016


CNES CLS GPS WEEK 1882 (DAYS: 31 - 37 , JUL50: 24136 - 24142 ) 
----------------------------------------------------------------

PRODUCT SUMMARY 

Submitted by: S. Loyer    (1), F. Perosanz (2), H. Capdeville (1), 
              F. Mercier  (2), A Mezerette (1)

(1) CLS, Toulouse, France
(2) CNES, Toulouse, France

Contacts: igs-ac at cls.fr
Web:      igsac-cnes.cls.fr 

PROCESSING STRATEGY 
-------------------
 Softwares used : PRAIRIE/GINS/DYNAMO   Version : CR4MGX

 grg.acn : GRG Analysis Center processing strategy and used models
           available at IGS GB:
           igscb.jpl.nasa.gov/igscb/center/analysis/grg.acn 

 Main Processing changes for grg final products :                              
              week 1436 : First delivery 
              week 1515 : 30 sec. GPS daily clocks
              week 1555 : Start of the fixed-integer products
              week 1580 : Simplification of B&W models
              week 1602 : Correction in the integer initialization of pwu 
              week 1618 : Delivery of Glonass ephemeris (no changes for GPS)
              week 1632 : PCVs from igs08.atx / Reference frame igs08 
              week 1659 : Combined GLO/GPS + Kouba's attitude law + gradients
              week 1701 : GNSS clocks now computed in COF frame  
              week 1702 : Switch to daily SINEX products
              week 1709 : Switch to IGb08 (refer to IGSMAIL 6663) 
              week 1718 : S1S2 atm.loading and CMC corrections (IERS2010) 
              week 1759 : Updated Standards / New Dyn for bloc IIA GPS
              week 1831 : Seasonal variations for a priori tropospheric model
                          gpt2 (corrected)  
              week 1840 : grg final products are identical to grm products 
                          delivered for MGEX (Multi Gnss EXperiment)
                          but contain only GPS and Glonass values. 
              week 1856 : adoption of  igs08_1854.atx containing conventional
                          MGEX values for GALILEO (see IGSMAIL 7126)   
               
FILES SENT TO IGS ARCHIVES (Multi Gnss EXperiment):
-------------------------------------------------------------------------
grm18827.erp.Z      GNSS daily earth rotation parameters, IGS format
grm1882?.snx.Z      GNSS daily coordinates/erp solution   
grm1882?.sp3.Z      15' daily orbits, sp3c format , GNSS (GPS/GLO/GAL)
grm1882?.clk.Z      30 sec. GNSS daily clocks, RINEX     (GPS/GLO/GAL)    
--------------------------------------------------------------------------
FILES SENT TO IGS ARCHIVES (IGS finals):
-------------------------------------------------------------------------
grg18827.sum.Z      This text file 
grg18827.erp.Z      GNSS daily earth rotation parameters, IGS format
grg1882?.snx.Z      GNSS daily coordinates/erp solution   
grg1882?.sp3.Z      15' daily orbits, sp3c format , GNSS (GPS/GLO) 
grg1882?.clk.Z      30 sec. GNSS daily clocks, RINEX     (GPS/GLO)
--------------------------------------------------------------------------
      

ERP RESULTS

version 2
CNES CLS GRGS ERP VALUES WEEK 1882 
________________________________________________________________________________________________________
  MJD       Xpole   Ypole   UT1-UTC   LOD    Xsig   Ysig UTsig LODsig Nr Nf Nt  X-RT  Y-RT  X-RTsig Y-RTsig DX  DY
             E-6"    E-6"  0.1 us  .1us/d    E-6"   E-6" .1 us .1us/d         E-6"  E-6"   E-6"    E-6" E-6"  E-6"   
57418.50   -2277  298458   269090   12389     55     55     0    17 119  0  0 -1681  2347    15    14      0      0
57419.50   -3981  300450   255890   12298     54     54     0    17 118  0  0 -1265  2073    15    14      0      0
57420.50   -5244  301968   243080   11809     54     54     0    17 117  0  0  -858  1720    15    14      0      0
57421.50   -6034  303483   230890   11502     55     55     0    17 119  0  0  -600  2099    15    14      0      0
57422.50   -6911  305466   218980   11300     54     54     0    18 120  0  0  -898  2042    16    14      0      0
57423.50   -8025  307254   206870   11950     55     55     0    17 118  0  0  -964  1872    15    14      0      0
57424.50   -9065  308930   193740   13533     56     56     0    18 120  0  0  -563  1827    16    14      0      0


ORBIT REPEATABILITY  (cm)

DAY1 (6h+24h+6h) |---|------------|---|
DAY2 (6h+24h+6h)              |---|------------|---|
    12h overlap:               xxx|xxx  
 
 -----------------------------------------------------------
  PRN  24136   24137   24138   24139   24140   24141   24142
 -----------------------------------------------------------
 G01    32 E     9 E     3 E     4 E     5 E     4 E     4 E
 G02     4 E     5 E     4 E     5 E     5 E     4 E     4 E
 G03     5       4       4       3       4       5       5  
 G05     4       4       4       4       4       4       4  
 G06     8 E     6 E     5 E     6 E     7 E     6 E     5 E
 G07     4       5       5       5       5       5       5  
 G08     4       4       3       5       5       4       4  
 G09     3       3       3       3       3       3       3  
 G10    15      14      13      18      19      14      13  
 G11     4 E     4 E     5       6       7       6       6  
 G12     3       4       4       5       5       5       4  
 G13     4       4       3       4       3       3       4  
 G14     3       3       3       3       3       2       3  
 G15     4       4       4       4       4       3       3  
 G16     6       7       5       6       6       5       6  
 G17     2       3       3       3       3       3       3  
 G18     6       6       6       6       6       6       7  
 G19     3       3       3       3       3       3       3  
 G20     5       4       4       4       4       4       4  
 G21     4 E     4 E     4 E     4 E     6 E     6 E     5 E
 G22     8       7       6       7       7       7       8  
 G23     4       4       4       4       4       4       5  
 G24     2       2       2       3       3       2       2  
 G25     3       3       2       2       3       2       2  
 G26     6       6       4       5       5       5       5  
 G27     5       6       5       6       6       4       4  
 G28     2       2       2       1       1       2       2  
 G29     2       2       3       4       4       3       2  
 G30     5       5       5       5       5       5       5  
 G31     5       4       4       3       4       4       4  
 ------------------------------------------------------------
 R01     7       6       8      10      10       9       7  
 R02     8       8       4       5       5       4       4  
 R03     5       7       8       5       4       5       6  
 R04     5       5       3       5       5       5       5  
 R05    10      10       6       5       7       8       9  
 R06    12       9       4       3       6       8       8  
 R07     4       6       6       6       5       5       7  
 R08     7       7       6       7       6       6       5  
 R09     3 E    10 E    11 E     8 E     7 E     6 E     7 E
 R10     5 E     4 E     5 E     5 E     4 E     7 E     9 E
 R11     6 E     4 E     4 E     5 E     7 E    10 E    12 E
 R12    10 E     7 E     5 E     8 E     9 E     8 E     7 E
 R13     7 E     7 E     4 E     3 E     4 E     5 E     5 E
 R14     7 E     8 E     8 E    15 E    15 E     8 E     9 E
 R15     4 E     4 E     5 E     6 E     7 E     5 E     2 E
 R16     6 E     4 E     5 E     5 E     6 E     7 E     5 E
 R17    17 E    20 E    16 E    10 E    13 E    16 E    16 E
 R18     6       6       5       3       2       3       4  
 R19     5       5       5       6       6       5       5  
 R20     6       4       5       6       6       5       4  
 R21     7       7       7       4       7       7       4  
 R22     5       4       6       6       4       6       8  
 R23     5       4       4       5       5       5       7  
 R24     6       5       5       5       6       6       5  
 ------------------------------------------------------------
 E11    20      18      13      16      14      16      17  
 E12     9      12      12      13      22      20       7  
 E14    11       8       6       4       4       4       5  
 E19    34      34      22      19      17      17      13  
 E22    10       8       8       6       8      11      13  
 E24    12 E    11 E     8 E    10 E    10 E     9 E     7 E
 E26    10      10       7       6      13      14       9  
 E30    15 E     7 E    14 E    13 E     5 E    12 E    17 E
 ------------------------------------------------------------
  MP     8       7       6       6       6       6       6  
  M2     4       5       4       4       4       4       4  
 -----------------------------------------------------------


REFERENCES CLOCKS (Gps Week  Day of week) 
----------------------------------------------------------------------
 1882    0         1         2         3         4         5         6 
      BRUX      BRUX      BRUX      BRUX      BRUX      BRUX      BRUX 
 13101M010 13101M010 13101M010 13101M010 13101M010 13101M010 13101M010 

UNDIFFERENCED GPS AMBIGUITIES STATISTICS (Global = w/o unfixed stations)
------------------------------------------------------------------------
 1882    0         1         2         3         4         5         6 
    97.54%    98.01%    97.99%    97.84%    97.57%    97.95%    98.06%
         4         1         2         1        12         2         6 (unfixed stations) 


STATIONS STATISTICS (GNSS = GPS + GLONASS + GALILEO) (nb of used measurements)

     CODE     NUMS          24136 24137 24138 24139 24140 24141 24142
---------------------------------------------------------------------
GNSS adis  3150204           3118  2921  2360  2838  3024  2741  1783
GNSS alrt  4016203           1466  1481  1482  1534  1481  1497  1499
GNSS areg  4220233           3733  3844  5053  3957  4007  3887  3708
GNSS artu  1236203           1267  1266  1244  1243  1186  1298  1284
GNSS aut0  4943103           3371  3147  2871  3350  2102  2784  3496
GNSS bake  4015207           3730  3710  3691  3764  3719  3707  3723
GNSS bjfs  2160106           2493  3012  3011  3028  2450     0  2535
GNSS bogt  4190119           2709  2772  2798  2796  2782  2697  2684
GNSS brst  1000422           3306  3395  3345  3363  3374  3417  3374
GNSS brux  1310163           3310  3356  3376  3447  3435  3406  3331
GNSS cas1  6601115           3440  3505  3696  3782  3699  3699  3722
GNSS ccj2  2173233           3369  3454  3419  3389  3454  3497  3433
GNSS chof  2178807           3539  3406  3018  3281  1975  2721  3339
GNSS chpg  4160923           3639  3766  3697  3008     0  3027     0
GNSS chti  5024204           3195  3146  3141  3141  3114  3141  3142
GNSS chum  2560110           1265   969     0  1253  1259  1285  1252
GNSS ckis  5021307           3168  3135  3172  3204  3164  3110  3103
GNSS coco  5012715           2660  2764  2733  2115  2207  2487  2715
GNSS daej  2390211              0     0     0     0     0  3161     0
GNSS darw  5013421           1908  1918  1905  1910  1972  1937  1849
GNSS dav1  6601019           3223  3358  2844  3239  3515  3430  3478
GNSS dgar  3080212           1296  1307  1275  1276  1227  1288  1246
GNSS djig  3990105           4006  3335     0  3059  3840  4011  3103
GNSS drag  2071011           2832  2873  2886  2396  2083  2683  1705
GNSS dubo  4013720           6022  6282  6300  6274  6468  6372  6216
GNSS dum1  9150103              0  1320  1097  1308  1268  1096  1311
GNSS dyng  1260211           3881  3832  3784  3926  3137     0  3195
GNSS fair  4040822           1230  1260  1330  1303  1289  1307  1288
GNSS ftna  9290205           3183  3812  3853  3849  3813  3614  3696
GNSS glsv  1235608           3115  3199  3206  3166  3205  3291  3281
GNSS gmsd  2174906           3701  3718  3748  3827  3814  3851  3831
GNSS gode  4045113           1225  1213  1211  1208  1179  1165  1197
GNSS gop7  1150251              0     0  4261  3651     0     0     0
GNSS hofn  1020419           3170  3217  3188  3249  3604  3655  3571
GNSS holb  4013034           3488  3479  3495  3478  3546  3499  3515
GNSS hrag  3030271           3888  3626  3364  3590  2674  2938  3802
GNSS hyde  2230710           2917  2870  2830  2894  2866  2983  3016
GNSS invk  4015005           1336   789   855   890   862   856   845
GNSS irkj  1231307           1539  1655  1937  2339  2012  1787  1753
GNSS ispa  4170323           1221  1195  1197  1226  1244  1221  1220
GNSS karr  5013919           2875  3206  2920  2336  1002  1670  2607
GNSS kely  4300513           1318  1345  1273  1294  1295  1248  1193
GNSS kiru  1040314           5386  4276  4360  4465  4342  4405  4422
GNSS kit3  1233409              0     0  2910     0     0     0     0
GNSS koug  9730155           3704  3643  3490  3268  3386  3643  3741
GNSS krgg  9120133           3603  3528  3416  3286  3555  3468  3421
GNSS kzn2  1237403           3802  3362  2696  2980  2081  2796  3741
GNSS lhaz  2161323           2399  2260  2332  2485  2508  2486  2531
GNSS lmmf  9720514           3188  3183  3186  3089  3198  3162  3119
GNSS lpgs  4151012           2787  2889  2787  2920  2946  2951  2887
GNSS mac1  5013512           2690  2699  2215  2390  2567  2723  2706
GNSS maju  5150114           3018  3028  3049  2480  2925  3125  3096
GNSS mal2  3320117           4118  4085  3770  3929  3708  3827  2339
GNSS mana  4120105           1269   782     0  1281  1291  1221  1276
GNSS mao0  4044501           3587  3206  3046  3359  2094  2737  3443
GNSS mas1  3130313           3802  3725  3797  3862  3747  3793  3879
GNSS mat1  1273441           1094  1067  1024  1022  1064  1096  1095
GNSS maui  4044516           1285  1126  1064  1291  1259  1252  1246
GNSS maw1  6600411           2978  3161  2991  3008  3415  3217  3049
GNSS mayg  9010103           3930  3978  3920  3943  3883  4005  3964
GNSS mcil  2178911           1293  1320  1294  1313  1301  1361  1335
GNSS mcm4  6600110           1349  1397  1387  1427  1383  1343  1287
GNSS metg  1050301           3972  4026  4095  3932  3002     0  4268
GNSS mgue  4155805           3787  3955  3899  3930  3859  3815  3752
GNSS mobs  5018206           2930  2973  2952  2400  2833  2984  2960
GNSS nain  4016403           1203  1204  1228  1216  1187  1203  1198
GNSS nklg  3280909           4971  3654  3638  3945  3986  4032  3969
GNSS nlib  4046515            957   970   984  1022  1028  1015   975
GNSS nnor  5018106           3567  3535  3518  3487  3559  3557  3491
GNSS not1  1271703           1070  1103  1072  1107  1146  1112  1136
GNSS nril  1236404           1379  1423  1304  1430  1446  1444  1425
GNSS nrmd  9270120           2984  2954  2971  3025  2961  2880  2895
GNSS nrmg  9270133           3125  4955  3708  3859  3978  3730  3529
GNSS nvsk  1231903            768     0     0   826   920   919   897
GNSS nya2  1031794           4056  4066  3933  3929  3877  5138  4179
GNSS ohi3  6600840           4170  4211  4235  4117  4163  4233  4123
GNSS ons1  1040254           3305  3374  3166  3269  3206  3461  3432
GNSS ous2  5021212           3426  3372  3367  3406  3386  3471  3286
GNSS pado  1275011           3596  3507  3681  3729  3695  3709  3706
GNSS palm  6600503           1384  1362  1390  1428  1401  1378  1406
GNSS parc  4171611           1375  1320  1329  1331  1335  1330  1342
GNSS pdel  3190611           3107  3113  3078  3127  3162  3222  3146
GNSS pen2  1120621           3120  3011     0     0  1257  2330  3496
GNSS pie1  4045616           2987  2995  3089  3135  3100  3071  3043
GNSS pimo  2200312           2438  2312  2354  2406  2421  2459  2428
GNSS pohn  5160117           2838  2888  2941  2786  2784  2913  2846
GNSS qiki  4016603           1402  1398  1408  1429  1365  1321  1318
GNSS reun  9740111           2989  3036  2962  2963  4115  3079  3821
GNSS rgdg  4150730           3319  4264  4239  4244  4278  4208  4162
GNSS scor  4300605           1407  1392  1362  1356  1404  1403  1349
GNSS scrz  4180105           3296  3244  3217  3255  3301  3324  3362
GNSS seyg  3980133           3154  4050  3972  3920  3932  4000  5130
GNSS sfer  1340212           2345     0  2453  2917  2954  2999  3054
GNSS sgoc  2350103           3047  3325  3269  2531  3220  3477  3577
GNSS shao  2160510           1185  1264  1249  1288  1231  1250  1253
GNSS sin1  2260141           4025  3055  3165  3272  2374  2921  3868
GNSS stfu  4943003           3979  3963  3798  3584  2105  3230  4151
GNSS stk2  2173116           3528  3483  3405  3432  3429  3590  3590
GNSS suth  3031410           1219  1201  1257  1227  1213  1256  1215
GNSS suwn  2390309           2288  2831  2824  2835  2333     0  2361
GNSS svtl  1235013           3569  3533  3503  3549  3560  3515  3486
GNSS syog  6600612           3532  3633  3001     0  2630  3494  3460
GNSS tash  1232709           3384  3448  3353  3368  3274  3349  3389
GNSS tcms  2360409           1217  1235  1262  1257  1236  1257  1276
GNSS tehn  2040405              0     0     0     0  1223  1003  1197
GNSS thtg  9220125           3679  3697  3596  3677  3684  3597  3563
GNSS tixi  1236009           3324  3317  3418  3491  3467  3500  3537
GNSS tlse  1000320           3969  3863  3892  3970  3703  3628  3902
GNSS tong  5090207           2605  2599  2648  2630  2499  2542  2603
GNSS tow2  5014016           3011  3067  2888  2345  2597  2929  2997
GNSS tro1  1030227           3435  3478  3523  3586  3644  4864  3566
GNSS tuva  5110106           3236  3205  3287  3343  3166  3211  3235
GNSS ucal  4910603           3436  3414  3233  3551  2120  3051  3819
GNSS ulab  2420107           3426  3455  3455  3590  3537  2085   776
GNSS unb3  4014628           3959  3935  3907  3969  3874  3942  3963
GNSS unx3  5019012           3462  3224  3130  3392  2121  2946  3600
GNSS urum  2161208           2627  2626  2655  2701  2755  2764  2727
GNSS vill  1340616           3691  3595  3635  3715  3604  3677  3736
GNSS voim  3330303           3576  3501  3437  3497  3501  3406  3398
GNSS wark  5024305           3176  3108  3126  3147  3063  3123  3144
GNSS wind  3110108           3441  3442  3405  3428  3441  3537  3545
GNSS wtzz  1420160           2969  3296  3326  3388  3359  3408  3376
GNSS wuh2  2160264           3300  3218  3235  3319  3214  3218  3281
GNSS xmis  5018311           3181  3170  3052  3111  3145  3132  4307
GNSS yell  4012732           3566  3549  3594  3630  3505  3631  3703
GNSS sum of station:          120   119   118   120   121   119   121
---------------------------------------------------------------------


SATELLITES STATISTICS  (nb of used measurements )

PRN  NUMS        24136 24137 24138 24139 24140 24141 24142
---------- GPS     data ----------------------------------
G01 66601         5204  5140  5128  5125  5003  5004  5300
G02 66602         5603  5559  5478  5470  5597  5437  5729
G03 66603         4844  4766  4776  4766  4681  4669  4876
G05 66605         5315  5322  5136  5138  5278  5168  5449
G06 66606         5360  5254  5177  5201  5241  5207  5465
G07 66607         4962  4840  4821  4942  4934  4804  4911
G08 66608         5063  4893  4898  5013  4901  4938  5064
G09 66609         4979  4830  4759  4792  4849  4772  4982
G10 77710         5340  5126  5200  5214  5443  5217  5297
G11 66611         5003  4921  4951  4914  4643  4832  5047
G12 66612         5614  5456  5323  5464  5407  5378  5654
G13 66613         5042  4966  4957  4897  5055  4901  5094
G14 66614         5524  5412  5407  5499  5433  5408  5644
G15 66615         5351  5236  5116  5009  5132  5092  5273
G16 66616         5163  4995  4882  4973  4863  5015  5084
G17 66617         5434  5441  5279  5227  5332  5175  5369
G18 66618         5153  4993  5009  5031  5012  4998  5126
G19 66619         5359  5337  5229  5126  5202  5078  5314
G20 66620         5397  5232  5222  5157  5206  5102  5415
G21 66621         5156  5744  4821  6817  4825  6768  4908
G22 66622         5116  5076  5065  5010  4927  4882  5190
G23 66623         4886  4768  4763  4765  4826  4727  4969
G24 66624         5675  5416  5167  5329  5246  5341  5746
G25 66625         5497  5260  5231  5296  5324  5273  5541
G26 66626         5028  4888  4848  4970  4912  4860  5141
G27 66627         5216  5045  5098  5154  5007  5103  5284
G28 66628         5225  5220  5161  5173  5228  5127  5298
G29 66629         5509  5414  5350  5290  5283  5228  5521
G30 66630         5025  4864  4773  4839  4970  4837  4906
G31 66631         5246  5125  5095  5064  5165  5120  5229
---------- GLONASS data ----------------------------------
R01 50001         7171  7241  7204  6977  6599  6382  6536
R02 50002         7017  7210  7244  7093  6715  6585  6755
R03 50003         6695  7029  7165  7040  6747  6730  6772
R04 50004         6683  6715  6885  7020  6618  6797  6844
R05 50005         6445  6528  6561  6722  6460  6737  6633
R06 50006         6919  6873  6699  6634  6476  6811  7162
R07 50007         7254  7130  6692  6613  6304  6766  7035
R08 50008         7196  7121  7101  6841  6443  6353  6850
R09 50009         6341  6032  5784  5663  5442  5864  6302
R10 50010         4781  4879  4585  4599  5811  6458  6992
R11 50011         7158  7303  7047  6525  6142  6332  6548
R12 50012         6999  7281  6855  6194  5537  6289  6613
R13 50013         6531  6890  7065  7187  6762  6520  6622
R14 50014         5877  6423  6812  6822  6626  6755  6559
R15 50015         6628  6767  6751  6762  6787  6939  6914
R16 50016         6985  6717  6593  6569  6632  7059  7510
R17 50017         3887  3598  3651  4378  4277  4587  4660
R18 50018         6965  6892  6978  7026  6728  6888  7110
R19 50019         7236  7071  7024  7027  6825  7050  7065
R20 50020         7245  7187  6991  6910  6456  6702  6975
R21 50021         7331  7401  7380  7029  6555  6852  6952
R22 50022         7324  7224  7253  7218  6590  6745  6970
R23 50023         7184  7222  7167  7115  6782  6588  6782
R24 50024         6744  6891  6550  5680  5490  5316  5349
---------- GALILEO data ----------------------------------
E11 40011         3907  3779  3944  3968  3187  3448  3648
E12 40012         3855  3624  3692  3994  3095  3314  3461
E14 40014         3447  3240  3179  3328  2762  3119  3200
E19 40019         3700  3723  3584  3875  2988  3221  3486
E22 40022         3647  3859  3812  3675  3262  3550  3600
E24 40024         3891  3771  3586  3846  3263  3217  3517
E26 40026         4009  3964  3792  3982  3413  3452  3523
E30 40030         3562  3846  3927  3751  3169  3461  3572
----------------------------------------------------------


global: TLSE BRST HOFN TRO1 NYA2 ONS1 KIRU METG PEN2 IRKJ   
global: NVSK TASH SVTL GLSV TIXI ARTU NRIL KZN2 DYNG NOT1   
global: MAT1 PADO BRUX SFER VILL WTZZ DRAG BJFS WUH2 SHAO   
global: URUM LHAZ STK2 CCJ2 GMSD CHOF MCIL PIMO HYDE SIN1   
global: SGOC TCMS SUWN ULAB CHUM HRAG SUTH DGAR WIND MAS1   
global: ADIS PDEL NKLG MAL2 VOIM SEYG DJIG YELL HOLB DUBO   
global: UNB3 INVK BAKE ALRT NAIN QIKI FAIR MAO0 MAUI GODE   
global: PIE1 NLIB MANA RGDG LPGS MGUE CHPG ISPA PARC SCRZ   
global: BOGT AREG KELY SCOR UCAL STFU AUT0 COCO DARW MAC1   
global: KARR TOW2 NNOR MOBS XMIS UNX3 OUS2 CKIS CHTI WARK   
global: TONG TUVA MAJU POHN MCM4 MAW1 PALM SYOG OHI3 DAV1   
global: CAS1 MAYG KRGG THTG NRMD NRMG FTNA LMMF KOUG REUN   
global: DUM1 GOP7 KIT3 TEHN DAEJ                            




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