[IGSREPORT-21788] Wk 1737 GRG Analysis report

igs-ac at cls.fr igs-ac at cls.fr
Fri May 3 08:33:20 PDT 2013


Author: CNES CLS GRGS Analysis Center

CNES CLS GPS WEEK 1737 (DAYS: 111 - 117 , JUL50: 23121 - 23127 ) 
----------------------------------------------------------------

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 
-------------------
 Software used : GINS/DYNAMO   Version : CR2LID

 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:
              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) 
               
FILES SENT TO CDDIS:
-------------------------------------------------------------------------
grg17377.sum.Z      This text file 
grg17377.erp.Z      GPS daily earth rotation parameters, IGS format
grg1737?.snx.Z      GPS daily coordinates/erp solution   (since week 1702)
grg17377.snx.Z      GPS weekly coordinates/erp solution (before week 1701) 
grg1737?.sp3.Z      15' daily orbits, sp3c format , GNSS (since week 1618)
grg1737?.clk.Z      30 sec.  GPS daily clocks, RINEX     (since week 1515)
--------------------------------------------------------------------------
      

ERP RESULTS

version 2
CNES CLS GRGS ERP VALUES WEEK 1737 
________________________________________________________________________________________________________
  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"   
56403.50   60454  391471  1275360   16387      7      7     0     4 133  0  0   914   927    17    15      0      0
56404.50   61523  392414  1258430   17446      7      7     0     4 134  0  0  1089   799    18    16      0      0
56405.50   62500  393114  1240520   18155      7      8     0     4 131  0  0   929   473    18    16      0      0
56406.50   63442  393639  1222270   18100      7      8     0     4 132  0  0   907   546    18    16      0      0
56407.50   64313  394103  1204390   17422      8      8     0     4 131  0  0   796   332    19    17      0      0
56408.50   65283  394471  1187590   15956      8      8     0     4 132  0  0   883   590    20    17      0      0
56409.50   65902  395081  1172540   14217      8      8     0     4 129  0  0   409   477    19    17      0      0


ORBIT REPEATABILITY  (cm)

DAY1 (6h+24h+6h) |---|------------|---|
DAY2 (6h+24h+6h)              |---|------------|---|
    12h overlap:               xxx|xxx  
 
 -----------------------------------------------------------
  PRN  23121   23122   23123   23124   23125   23126   23127
 -----------------------------------------------------------
 G01     4       3       3       2       3       3       3  
 G02     3       3       2       3       3       2       3  
 G03     2       2       2       2       2       1       1  
 G04     2       3       3       2       2       3       4  
 G05     3 E     2 E     3 E     3 E     3 E     3 E     3 E
 G06     2       2       2       2       2       2       2  
 G07     3       2       2       3       3       4       4  
 G08     1       2       2       1       1       2       2  
 G09     2       3       2       2       2       3       3  
 G10     2 E     3 E     3 E     4 E     4 E     2 E     3 E
 G11     2       3       3       2       2       3       4  
 G12     5       6       6       5       5       8      10  
 G13     3       3       4       5       5       4       3  
 G14     2       3       3       2       2       2       2  
 G15     3       3       3       4       5       4       3  
 G16     3       3       3       3       3       4       5  
 G17     1       1       2       2       2       2       2  
 G18     4 E     6 E     7 E     5 E     3 E     4 E     4 E
 G19     2       2       2       2       2       2       2  
 G20     4 E     5 E     5 E     4 E     8 E     8 E     6 E
 G21     2       3       3       3       3       2       1  
 G22     3 E     3 E     4 E     4 E     5 E     5 E     3 E
 G23     3       3       4       4       5       4       3  
 G24     1       2       2       2       1       2       3  
 G25     2       3       4       4       3 E     3 E     3 E
 G26     1       2       2       2       2       2       2  
 G28     3       2       2       2       2       2       2  
 G29     2       2       2       2       2       2       2  
 G30     3 E     3 E     5 E     6 E    10 E     9 E     3 E
 G31     2       2       2       2       2       1       1  
 G32     7 E     3 E     5 E     6 E     5 E     4 E     4 E
 ------------------------------------------------------------
 R01     6       9      11       9 E     5 E     6 E     8 E
 R02     9       8      12      11 E     7 E     6 E     5 E
 R03     7       5       0       0       9 E     9 E     4 E
 R04     4       6       7       7 E     7 E     5 E     5 E
 R05     4       8       9       6 E    10 E    11 E     6 E
 R06     4       5       6       6 E     5 E     5 E     4 E
 R07     4       6       7       7 E     6 E     4 E     5 E
 R09     6       5       6       5       4       3       2  
 R10     5       5       4       4       4       5       7  
 R11     6      10       9       8      10       8       5  
 R12     5       4       5       6       6       7       9  
 R13     6       6       5       4       3       5       7  
 R14     5       9      10       6       6       6       6  
 R15     8       8       4       6       6       5       7  
 R16     4       7       7       5       4       3       2  
 R17     5       4       3       4       4       4       5  
 R18     5       4       5       5       3       4       5  
 R19    10       9       6       6       5       6       6  
 R20     5       6       5       5       6       9      10  
 R21     7       9       7       5       6       5       2  
 R22     5       4       3       6       6       4       4  
 R23     5       4       4       5       7       7       5  
 R24     4       4       3       2       2       3       5  
 ------------------------------------------------------------
  MP     4       4       4       4       4       4       4  
  M2     3       3       3       3       3       3       3  
 -----------------------------------------------------------


REFERENCES CLOCKS (Gps Week  Day of week) 
----------------------------------------------------------------------
 1737    0         1         2         3         4         5         6 
      AMC2      AMC2      AMC2      AMC2      AMC2      AMC2      AMC2 
 40472S004 40472S004 40472S004 40472S004 40472S004 40472S004 40472S004 

UNDIFFERENCED GPS AMBIGUITIES STATISTICS (Global)
----------------------------------------------------------------------
 1737    0         1         2         3         4         5         6 
    99.08%    98.94%    98.68%    99.04%    98.87%    98.54%    98.91%


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

    CODE     NUMS          23121 23122 23123 23124 23125 23126 23127
--------------------------------------------------------------------
GNSS abmf  9710312           3234  3243  3034  3186  3206  2990  3050
GNSS adis  3150204           2798  1359  1795  2809  2989  2912  2886
GNSS ajac  1007711           3098  3078  3044  3045  3094  3046  3111
GNSS alic  5013715           3121  3079  2992  2967  3003  3046  3092
GNSS alrt  4016203           1466  1474  1463  1475  1465  1481  1496
GNSS amc2  4047211           1226  1217  1203  1213  1217  1189  1207
GNSS areq  4220213           1390  1386  1341  1375  1263  1351  1286
GNSS artu  1236203           1268  1293  1313  1311  1321  1321  1336
GNSS aspa  5050305           2951  2817  2735  2940  3009  2955  3027
GNSS auck  5020917           2881  2802  2776  2889  2907  2876  2866
GNSS bake  4015205           3499  3518  3419  2563     0     0     0
GNSS barh  4992707           3084  3231  3030  2931  3124  3020  3135
GNSS bjfs  2160106           3047  3067  3024  2992  3008  3039  3110
GNSS bogt  4190117           1217   838   664  1146  1236  1240  1216
GNSS braz  4160616           1353  1342  1322  1070   418     0     0
GNSS brft  4160213           1332  1258  1257  1330  1323  1281  1324
GNSS brmu  4250116           2944  3188  2814  2951  3141  2978  3063
GNSS brst  1000422           3170  3180  3102  3099  3253  3238  3187
GNSS brux  1310163           3324  3343  3248  3249  3403  3343  3346
GNSS bucu  1140108           3187  3184  2996  3006  3189  3128  3168
GNSS bzrg  1275121           2644  2965  2891  2875  1908  2396  2992
GNSS cas1  6601108           2940  2897  3003  3180  3114  3044  3479
GNSS cedu  5013815           2746  2753  2715  2557  2687  2781  2686
GNSS chti  5024204           3131  3117  3027  3041  3102  3083  3114
GNSS chur  4012826           3568  3571  3475  2736  1853  2125  3484
GNSS coco  5012714           1322  1319  1366  1330  1316  1288  1295
GNSS conz  4171922           2918  2930  2844  2867  2847  2855  2939
GNSS cro1  4320116           1167  1147  1198  1199  1173  1179  1179
GNSS darw  5013421           2235  2284  2339  2410  2331  2517  2530
GNSS dav1  6601019           3696  3577  3153  2981  3269  2801  3148
GNSS dgar  3080212           1308  1278  1370  1327  1344  1343  1295
GNSS drao  4010532           3148  3141  3058  3080  3133  3046  3136
GNSS dubo  4013712           2841  2864  2749  2764  2998  2772  2722
GNSS dum1  9150103              0     0     0  1319  1095   369     0
GNSS faa1  9220126           2986  3041  2456  2636  2792  2851  2915
GNSS fair  4040822           1239  1229  2179  1168  1197  1173  1171
GNSS glps  4200516           1408  1398  1394  1401  1398  1386  1393
GNSS glsv  1235608           3281  3224  3219  3223  3208  3282  3327
GNSS gold  4040511           2818  2822  2748  2827  2824  2780  2852
GNSS gope  1150218            982  2339  2777  2787  2993  2974  2927
GNSS guam  5050109           1150  1176  1142  1157  1139  1154  1126
GNSS guat  4090108           3196  3149  3149  3168  3066  2769  3090
GNSS guug  8230111           3031  2897  3078  3068  3049  3186  3136
GNSS harb  3030231            564   545   687  1941  1333  2007  1294
GNSS hert  1321215           3103  3165  3004  3050  3196  3130  3210
GNSS hnpt  4991316           3038  3140  3004  3085  3145  3111  3129
GNSS hob2  5011612           3205  3242  3146  3095  3183  3263  3256
GNSS hofn  1020413           3375  3381  3215  3062  2994  3223  3233
GNSS holm  4014807           1456  1446  1416  1406  1395  1354  1386
GNSS hrao  3030219           1186  1190  1202  1203  1225  1232  1262
GNSS hyde  2230710           2863  2784  2742  2836  2798  2893  2813
GNSS iisc  2230611           1217  1162  1104  1199  1230  1259  1215
GNSS irkj  1231307           1608  1694  1582  1626  1938  2507  2408
GNSS irkt  1231303            902   820   809   896   899   880   814
GNSS karr  5013915           2837  2768  2734  2716  2735  2733  2599
GNSS kir0  1042221           3623  3598  3499  3238  3247  3512  3621
GNSS kit3  1233409            454   331   884   942   911  1385  2889
GNSS kokb  4042421           1330  1341  1355  1321  1328  1310  1312
GNSS kouc  9272708           2537   668     0     0     0     0     0
GNSS kour  9730125           3200  3154  3084  3073  3153  3205  3218
GNSS lama  1220913           3148  3005  2889  2943  2986  3078  3133
GNSS lhaz  2161319           2538  2458  2339  2378  2490  2509  2462
GNSS lpgs  4151012            796  1170  1157   789  1066  1390  1436
GNSS mac1  5013512           3208  3244  2990  2681  3235  4221  3308
GNSS mal2  3320116           3034  3136  2940  2881  3073  3222  3114
GNSS mana  4120105           1262  1263  1263  1270  1258  1221  1276
GNSS mar6  1040512           3408  3455  3327  3344  3347  3429  3471
GNSS mas1  3130313           3003  3037  2967  2951  2959  3011  3026
GNSS mate  1273417           3019  2957  2862  2934  2996  3011  2890
GNSS maw1  6600411           3563  3319  2770  2641  3856  2829  3157
GNSS mbar  3390107           3254  3223  3095  3138  3263  3314  3185
GNSS mcil  2178910           1235  1242  1252  1240  1267  1285  1234
GNSS mcm4  6600110           1447  1436  1420  1439  1453  1468  1479
GNSS mdo1  4044211           1226  1257  2264  1263  1232  1250  1268
GNSS mdvj  1230909           2867  2857  2763  2633  2902  2767  2743
GNSS mkea  4047708           1173  1189  2188  1173  1118  1124  1159
GNSS mqzg  5021417           3010  2971  2939  2940  3023  3019  2252
GNSS nano  4013817           3307  3292  3240  3215  3185  3177  3263
GNSS nico  1430213           3065  3003  2850  2955  3033  3033  3034
GNSS nklg  3280909           2469  1750  2624  2603  1662  1287  2427
GNSS not1  1271703           1026  1036  1044  1068  1121  1103  1130
GNSS novm  1236701           1708  1764  1725  1710  2065  2534  2532
GNSS nrc1  4011420           3271  3306  3208  3219  3284  3251  3231
GNSS nril  1236404           1473  1494  1473  1326  1321  1465  1449
GNSS nrmd  9270115           2600   688     0     0     0     0     0
GNSS ntus  2260114           2634  2324  2380  2277  3279  2819  2542
GNSS nyal  1031706           1431  1468  1439  1483  1437  1482  1479
GNSS ohi2  6600812            690  2768  3027  2970  3101  3334  3385
GNSS ohi3  6600834           3400  3483  3380  3242  3442  3472  3457
GNSS onsa  1040208           3356  3350  3226  3041  3311  3340     0
GNSS palm  6600503           1365  1406  1374  1362  1354  1398  1428
GNSS pdel  3190611           3136  3107  3034  3103  3064  3014  3087
GNSS penc  1120608           3043  3006  2948  3004  2925  2976  1982
GNSS pimo  2200310           1122  1078  1112  1140  1108  1134  1113
GNSS pol2  1234815           1193  1109   789  1183  1289  1290  1280
GNSS polv  1233606           3305  3296  3258  3129  3183  3085  3213
GNSS pots  1410613            806   544  2436  3007  1775  2529  3183
GNSS qaq1  4300708              0   729  1237  1033  1227  1233  1307
GNSS ramo  2070311           2494  2595  2561  2464  2621  2801  2715
GNSS reso  4014904           1452  1484  1460  1466  1456  1447  1455
GNSS reun  9740111           1785  2508  2885  3941  3090  4181  4231
GNSS reyk  1020221           3367  3393  3292  3021  2970  3174  3284
GNSS sch2  4013308           3385  3369  3223  3173  3437  3360  3279
GNSS scor  4300605           1432  1411  1372  1333  1328  1333  1375
GNSS sfer  1340211           1281  1271  1282  1281  1293  1314  1318
GNSS spt0  1042507           3420  3389  3282  3362  3481  3397  3323
GNSS stjo  4010133           3127  3183  3128  2912  3251  3198  3229
GNSS str1  5011925           3086  3115  2971  2999  3118  3066  3090
GNSS suth  3031410           1267  1015   311     0     0   874  1282
GNSS svtl  1235010           3394  3417  3303  3324  3537  3472  3437
GNSS syog  6600608           1416  1400  1369  1296  1177  2332  1459
GNSS thti  9220108           1413   841  1003  1265  1806  1297  1106
GNSS thu3  4300108           1445  1462  1468  1496  1464  1460  1472
GNSS tidb  5010314           1210  1279  1190  1166  1153  1174  1158
GNSS tixi  1236009           3613  3582  3455  3321  3287  3308  3549
GNSS tlse  1000319           2459  1842  1461  1712  1544  1536  1668
GNSS tnml  2360404           1025   367     0     0     0     0   334
GNSS tow2  5014014           3163  3145  3102  3070  3172  3127  3197
GNSS tro1  1030227           3677  3657  3396  3227  2519  2923  3665
GNSS unsa  4151412            984  1036   739   906   959   940   984
GNSS urum  2161208              0     0     0  1664  1679  2016  2511
GNSS usn3  4045141           1263  1247  1277  1278  1253  1254  1277
GNSS usno  4045127             52    80   219   640   629   592   650
GNSS vis0  1042318           3419  3435  3342  3359  3323  3257  3320
GNSS wes2  4044037           2736  2686  2805  2821  2643  2811  2798
GNSS whit  4013616           3563  3596  3470  3480  3575  3565  3561
GNSS wind  3110108            915  1499  1726   709   519  1288  2359
GNSS wroc  1221732           3362  3320  3106  3091  3231  3192  3238
GNSS wsrt  1350607           1317  1324  1296  1313  1313  1313  1307
GNSS wtzr  1420124           2880  2903  2752  2688  2801  1500     0
GNSS wtzz  1420159              0     0     0     0     0  2568  2391
GNSS xmis  5018304           3111  3095  3132  3087  3253  3202  3047
GNSS yarr  5010716           1233  1237  1223  1254  1228  1241  1254
GNSS yebe  1342011           1188  1194  1197  1164  1209  1219  1229
GNSS yell  4012721           1415  1426  1440  1445  1399  1410  1408
GNSS zamb  3460105           1332  1251  1313  1325  1351  1351  1323
GNSS zeck  1235113           3076  3058  3075  3065  3047  1748     0
GNSS sum of station:          133   134   131   132   131   132   129
--------------------------------------------------------------------


SATELLITES STATISTICS  (nb of used measurements )

PRN  NUMS        23121 23122 23123 23124 23125 23126 23127
---------- GPS     data ----------------------------------
G01 66601         5199  5168  5206  5267  5383  5397  5181
G02 66602         5515  5553  5699  5487  5503  5757  5631
G03 77703         5195  5228  5273  5469  5287  5313  5299
G04 77704         5423  5459  5496  5346  5152  5440  5216
G05 66605         5214  5144  5340  5245  5135  5329  5177
G06 77706         5145  5254  5231  5608  5062  5000  5228
G07 66607         4968  4947  5015  4839  4893  4965  4792
G08 77708         4874  4921  4943  4853  4899  4887  4775
G09 77709         4878  4886  4788  4828  4707  4902  4767
G10 77710         4678  4749  4852  4701  4713  4899  4732
G11 66611         5281  5246  5275  5330  5382  5378  5220
G12 66612         5782  5497  5866  5902  5729  6042  5888
G13 66613         4824  4805  4824  4733  4848  5033  4888
G14 66614         5585  5459  5442  5528  5538  5424  5539
G15 66615         4816  4785  4991  5070  4933  5082  5067
G16 66616         5597  5461  5650  5685  5659  5713  5790
G17 66617         5642  5632  5695  5726  5626  5724  5571
G18 66618         5491  5315  5346  5556  5449  5487  5472
G19 66619         5349  5220  5368  5404  5308  5435  5331
G20 66620         5897  6078  6132  6149  6173  6305  6064
G21 66621         5230  5038  5061  5173  5062  5099  5178
G22 66622         5213  5075  5039  5246  5292  5229  5235
G23 66623         5194  5308  5426  5304  5349  5576  5381
G24 66624         4692  4561  4529  4570  4589  4683  4662
G25 66625         5295  5124  5301  5728  5530  5747  5846
G26 77726         4756  4694  4763  4792  4587  4708  4716
G28 66628         5017  5104  5153  4994  4986  5152  4848
G29 66629         5658  5424  5667  5750  5601  5718  5561
G30 77730         3320  3000  3248  3232  3331  3282  3249
G31 66631         6275  6116  6147  6247  6443  6545  6363
G32 77732         6133  6275  6244  6343  6288  6395  6229
---------- GLONASS data ----------------------------------
R01 50001         6300  5780  5793  6124  5845  5660  6100
R02 50002         6325  6385  5920  6014  5915  5753  5484
R03 50003         5947  6326     0     0  3022  4095  5700
R04 50004         5625  5959  6406  6151  5819  5757  6071
R05 50005         6016  5656  6100  6552  6485  6149  6045
R06 50006         6123  5897  5795  6038  6399  6601  6017
R07 50007         6054  6035  6002  5673  6049  6631  6368
R09 50009         6432  5838  5918  5851  5773  6664  7215
R10 50010         7033  6273  6006  6098  5817  6043  6761
R11 50011         6816  6592  6103  5658  5464  5586  5677
R12 50012         6374  6700  6510  6027  5456  5614  5596
R13 50013         5923  6282  6933  6817  6213  5649  5919
R14 50014         5839  5934  6274  6139  6410  5993  5606
R15 50015         6035  5672  6081  6521  6990  6950  6428
R16 50016         5752  5709  5535  5711  6264  6895  6493
R17 50017         6558  6484  6325  6530  6594  6564  6488
R18 50018         6618  6704  6566  6325  6360  6560  6599
R19 50019         6312  6505  6591  6482  6151  6329  6606
R20 50020         6266  6146  6512  6300  6275  6072  6248
R21 50021         6419  6217  6296  6550  6537  6422  6281
R22 50022         6371  6461  6478  6224  6274  6575  6307
R23 50023         6346  6318  6635  6605  6052  6284  6500
R24 50024         6571  6377  6435  6668  6320  6445  6494
---------- GLONASS LASER data (with no weigth - GR2LID) --
R01 50001            9     0     6    13    27    19    17
R02 50002           12    10    27    24    19    11     5
R03 50003           15     7     0     0    30    27    29
R04 50004           10    12     5    16    27    15     2
R05 50005           15     6     5    34    38    10    17
R06 50006            6     7    10    13    17    12    10
R07 50007           34     7    18    47    62    73    25
R09 50009           15    12    24    26    25    28    16
R10 50010            2     1    19    23    14    17     6
R11 50011           39    57    63    49    23    42    19
R12 50012            9    16    38    30    33    33    22
R13 50013            4     1     9    10     3     3     7
R14 50014            2     0    11    20    22    20    11
R15 50015           13     0    30    42    32    21     6
R16 50016           10    11     7    25    19    25    14
R17 50017           29    26    48    45    46    61    43
R18 50018           20    11    41    52    27    26    30
R19 50019            3     9     6    12    22    17     9
R20 50020            8     4     5    12    19    10    11
R21 50021            6     0     1     9    17    13    10
R22 50022            2     8    18    23    20    17     8
R23 50023           10     5    16    21    14    16    10
R24 50024           10     0    12    27    26    31    17
----------------------------------------------------------


global: TLSE BRST AJAC REYK HOFN TRO1 NYAL ONSA MAR6 KIR0   
global: VIS0 SPT0 PENC BUCU GOPE LAMA WROC MDVJ IRKT IRKJ   
global: KIT3 POLV POL2 SVTL ZECK GLSV TIXI ARTU NRIL NOVM   
global: NOT1 MATE BZRG BRUX HERT SFER YEBE WSRT POTS WTZR   
global: NICO RAMO BJFS LHAZ MCIL PIMO IISC HYDE NTUS TNML   
global: HRAO HARB SUTH DGAR WIND MAS1 ADIS PDEL NKLG MAL2   
global: MBAR ZAMB STJO DRAO NRC1 YELL CHUR SCH2 WHIT DUBO   
global: NANO HOLM RESO BAKE ALRT GOLD FAIR KOKB WES2 MDO1   
global: USNO USN3 AMC2 MKEA GUAT MANA LPGS UNSA BRFT BRAZ   
global: CONZ BOGT GLPS AREQ BRMU THU3 SCOR CRO1 HNPT BARH   
global: TIDB YARR HOB2 STR1 COCO DARW MAC1 ALIC CEDU KARR   
global: TOW2 XMIS AUCK MQZG CHTI GUAM ASPA MCM4 MAW1 PALM   
global: SYOG OHI2 OHI3 DAV1 CAS1 GUUG THTI FAA1 NRMD KOUC   
global: ABMF KOUR REUN QAQ1 URUM DUM1 WTZZ                  




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