#   yearbase = 2018
#    refuv_inputfile='a_ex.gps',
#    refuv_source='nav',
#    ens_len=300,
#    bl_half_width=3,
#    pgmin=50,
#    rl_startbin=2,
#    rl_endbin=20
  174.383287        1e+38        1e+38
  174.386759        1e+38        1e+38
  174.390231 -2.24797303209 -2.41623496668
  174.393704 -2.39720670706 -2.51616153483
  174.397176 -2.2376359058 -2.45046540344
  174.400648 -2.32220383521 -2.42778887197
  174.404120 -2.31874059023 -2.47857638585
  174.406690 -2.36823833555 -2.5246079657
  174.453715 -1.85035285085 -3.44471228789
  174.457188 0.402668349644 -0.18092349311
  174.460660 0.0188593683731 -0.0169616503677
  174.464132 0.00337660579361 0.0262086357877
  174.467604 -0.00900392301743 0.0847771013837
  174.471076 0.117651617872 0.362945037005
  174.474549 -0.176665618354 0.149336797975
  174.478021 -0.18132281724 0.0957066358348
  174.481493 0.000357146685837 -0.0063795407361
  174.484965 0.255704908063 -0.0548353853059
  174.488438 0.400480381641 -1.09971341928
  174.491898 0.626292018276 0.133218823327
  174.495370 -0.250640882653 -0.256514431472
  174.498843 -0.79881507032 -0.453512425244
  174.502315 -0.332021841533 -0.186179977349
  174.505787 -0.0750959988313 -0.112903947474
  174.509259 -0.0235217024054 -0.0395719628743
  174.512731 0.00660095397719 0.0216025869887
  174.516204 -0.130052756966 -0.101499415275
  174.519676 0.087264259128 0.00315747685035
  174.523148 0.125785282916 0.057920029094
  174.526620 -0.075180103203 0.0648975893276
  174.530093 -0.0891087418583 0.140574707697
  174.533565 -0.0593512864406 0.147332381754
  174.537037 -0.0762286546247 0.123927798816
  174.540509 -0.0914189571968 0.111521503088
  174.543981 -0.0411894104008 0.173961644169
  174.547454 -0.0113039603196 0.0108454968185
  174.550926 -0.0229108488423 -0.0465806250406
  174.554398 -0.0259374519837 0.00281619283047
  174.557870 -0.0643356034411 -0.0257755117891
  174.561343 0.0212277157149 0.0218548569905
  174.564815 -0.0787515132105 -0.0525600204404
  174.568287 -0.0296724715676 0.000246837873248
  174.571759 -0.0600207440272 -0.0454732547802
  174.575231 -0.0247886537952 0.0127157915749
  174.578704 -0.0429171111443 -0.0550000381145
  174.582176 -0.0472714012192 -0.0349417108856
  174.585648 -0.0675579524453 -0.0168068571878
  174.589120 -0.0152961374707 -0.0213465304986
  174.592593 -0.0728842715354 -0.0776666322429
  174.596065 0.0251793029419 0.0654479774227
  174.599537 -0.00274396150017 -0.02697964417
  174.603009 -0.0739951106637 -0.0524929750846
  174.606481 -0.0340764615372 -0.04572330272
  174.609954 -0.0525266876389 -0.0358478905917
  174.613426 -0.0328946606481 -0.0277874974582
  174.616898 0.00588087833076 -0.016278793825
  174.620370 -0.0868160081466 -0.0418063765963
  174.623843 -0.0202381018306 -0.0392030313746
  174.627315 -0.00956157753081 -0.0101754452754
  174.630787 -0.020345531574 -0.0196805609307
  174.634259 -0.0496609973294 -0.0170178744131
  174.637731 -0.030403952355 -0.0353279734092
  174.641204 -0.0100551307298 -0.0288165253137
  174.644676 0.0076303046529 0.00999186709708
  174.648148 -0.0527314415189 -0.103251090544
  174.651620 0.00479072139932 -0.0231687028162
  174.655093 0.0343965163443 -0.0287047177246
  174.658565 -0.0299821016006 -0.0607338360233
  174.662037 -0.0280899922251 -0.0439498787231
  174.665509 -0.014452607891 -0.0357185584672
  174.668981 -0.0203395015205 -0.106560791424
  174.672454 -0.0089894703882 0.010117361041
  174.675926 -0.0118785629429 -0.0271949176912
  174.679398 -0.0222452682297 -0.0829688660856
  174.682870 -0.0128925845942 -0.0150946095301
  174.686343 0.0136238327033 0.0223938523254
  174.689815 0.0150398192013 -0.0818282739863
  174.693287 -0.0346938493444 -0.0176846485257
  174.696759 0.00144223302082 -0.000599267637614
  174.700231 0.0258029561903 -0.00641056135687
  174.703704 -0.0342555571591 0.00199807146827
  174.707164 0.0233894660351 0.0123909432847
  174.710637 0.00051773383816 -0.062481310607
  174.714109 -0.00217254079777 -0.0635989624181
  174.717581 -0.0249069113568 -0.0366476051561
  174.721053 0.0182412879313 -0.0441892562249
  174.724525 0.00196522052884 -0.00755508531301
  174.727998 0.0655499830106 -0.0557405393807
  174.731470 -0.0134357698179 0.000706432238527
  174.734942 0.0500180652909 -0.0490998357745
  174.738414 0.00942658011521 -0.0307605420935
  174.741887 0.0288938288727 -0.00553116558936
  174.745359 0.0454474279257 -0.0348244359847
  174.748831 0.00732766068815 -0.0685146374294
  174.752303 0.0153295200275 0.0528959088051
  174.755775 -0.0230009730824 -0.0364547768297
  174.759248 0.0157036747786 0.0299173883224
  174.762720 -0.0182755141921 -0.0374879872972
  174.766192 0.0155278861718 0.0185854636959
  174.769664 -0.00022986657508 -0.00404308527329
  174.773137 0.00681568507651 0.0308847509577
  174.776609 0.00895671791805 -0.00205107690798
  174.780081 -0.0193406894832 -0.0538591929834
  174.783553 0.0132536677974 0.0473112774157
  174.787025 0.0364161886092 -0.0827300196814
  174.790498 -0.00123488959182 0.0338345204284
  174.793970 0.0283166933946 -0.0861313912173
  174.797442 0.0201798880619 -0.0122757085991
  174.800914 -0.00747266593274 0.0399492324483
  174.804387 0.0111262972711 -0.057479638308
  174.807859 -0.00120578056185 -0.0202858718139
  174.811331 -0.00791425875397 -0.0396580585323
  174.814803 -0.0103234573669 -0.00275504933283
  174.818275 -0.00542650605343 -0.00863383618569
  174.821748 0.0179701717643 0.0145125691335
  174.825220 -0.0214247696061 -0.0618727875098
  174.828692 0.0120930082211 0.00804686467726
  174.832164 -0.00853742836826 -0.0202639049535
  174.835637 0.0332250386989 -0.0658850758622
  174.839109 -0.0132151307249 0.00905447865471
  174.842581 0.019760160663 0.0192128505507
  174.846053 -0.0194703574179 -0.0242671279244
  174.849525 -0.00122169469949 -0.000506897962322
  174.852998 0.0298873171461 0.0281953247854
  174.856470 0.243853865112 0.108137481822
  174.859942 0.387550828176 0.107569085556
  174.863414 0.472211622023 0.166989917876
  174.866887 0.404922554769 0.273663589328
  174.870359 0.322467107642 0.172146374741
  174.871887 0.302184845476 0.233122554798
  175.414468        1e+38        1e+38
  175.417940        1e+38        1e+38
  175.421412 0.972357235767 0.106188470765
  175.424884 0.796333332588 -0.0837425316191
  175.428356 0.446485253225 0.450412254643
  175.431829 -0.086330140939 -0.0684801516553
  175.435301 -0.00230008126429 0.0160859980093
  175.438773 0.0686080737828 -0.0192286253625
  175.442245 0.463190415858 0.099231262003
  175.445718 0.630655383356 0.0572795607642
  175.449190 0.520530595206 0.021485983202
  175.452662 0.0585062957719 -0.0736063796764
  175.456134 -0.390086358718 -0.117417625239
  175.459606 -0.652746140337 0.0127241241482
  175.463079 -1.68332582023 -0.253811858641
  175.466551 -2.68797618749 -0.210109067083
  175.470023 -1.1809644783 0.0181366015288
  175.473495 0.120289889256 0.0262996349646
  175.476968 0.0161200876529 -0.0227416184918
  175.480440 -0.0307729909558 0.0198196859975
  175.483912 -0.0013503382446 -0.00716748469375
  175.487384 0.0492821464344 -0.015442509831
  175.490856 -0.0254498903903 0.00579392447146
  175.494329 -0.0114841598644 0.015994111373
  175.497801 0.0274386489112 0.00585677129039
  175.501273 -0.0446038366234 -0.038142288198
  175.504745 0.0225266975376 0.0223104223837
  175.508218 0.00821685867926 -0.0111727128948
  175.511690 0.0133581318959 0.00189990472231
  175.515162 0.291520411138 0.00830925239068
  175.518634 0.399840979775 -0.0514995008063
  175.522106 0.407764064147 0.0407727200249
  175.525579 0.562453601393 0.126513501734
  175.529051 0.709343002311 0.301970513117
  175.532523 0.0308151754045 0.0282799175288
  175.535995 -0.0854450906064 -0.116363172927
  175.539468 -0.0399423903088 -0.0568619540446
  175.542940 0.00536740138868 0.03206542746
  175.546412 0.0934342770198 0.06156891202
  175.549884 0.106439131177 0.131486500452
  175.553345 -0.0134236284899 0.0285493791265
  175.556817 0.0214215227796 0.0281205540082
  175.560289 0.0174761222092 -0.0185871153929
  175.563762 -0.0420961320235 -0.00179141796755
  175.567234 0.0546600413002 0.0352255551639
  175.570706 -0.0172375945622 -0.0416982180831
  175.574178 -0.0355548929918 -0.0155421890257
  175.577650 -0.0361509726113 0.0229357262984
  175.581123 -0.0448879808101 -0.0175482504335
  175.584595 -0.107736044603 -0.018655854231
  175.588067 -0.022593827198 -0.0312565863662
  175.591539 -0.0429081232372 -0.0312161426539
  175.595012 0.0411501678993 0.00317361077793
  175.598484 -0.0670906505665 -0.0653225937463
  175.601956 -0.0425164533331 -0.0451752605663
  175.605428 -0.0595453890101 -0.0379986185886
  175.608900 0.0151591352465 -0.0283672822028
  175.612373 -0.069387319432 -0.0569940702699
  175.615845 -0.0358988835791 -0.0578396955254
  175.619317 -0.0132558034754 -0.00949324988817
  175.622789 -0.0299926412987 0.010980213898
  175.626262 -0.0832476279627 0.0287193486589
  175.629734 -0.0607545417861 0.0493833643922
  175.633206 -0.0817623403121 0.0376980539476
  175.636678 -0.0234249542878 0.0454064549864
  175.640150 -0.0900758916095 0.00238070196675
  175.643623 -0.0385760363693 0.0592506997435
  175.647095 -0.047201714567 0.00639579835967
  175.650567 -0.0749927021126 0.0453570142956
  175.654039 -0.085578481183 0.0457086584217
  175.657512 -0.0569204899257 0.0391224524089
  175.660984 -0.0393158137298 0.0221031326505
  175.664456 -0.0692724877716 0.0576662855089
  175.667928 -0.0170431597033 0.00341928587471
  175.671400 -0.00886072827455 -0.0144412814269
  175.674873 0.0208578637009 0.0110936826765
  175.678345 -0.0173489916931 -0.0227465284129
  175.681817 0.00249516333589 0.0271621430437
  175.685289 0.0263676185738 -0.0099168319195
  175.688762 -0.0224994150847 -0.00198128292815
  175.692234 -0.0506909400511 -0.0339387209327
  175.695706 -0.00508202507185 0.020221758918
  175.699178 -0.0819063672943 -0.00717361401617
  175.702650 -0.0611344498783 0.0460218416418
  175.706123 -0.0643195493798 -0.0061711401973
  175.709595 -0.000833614149348 0.011648088786
  175.713067 -0.0720531141529 0.0424635393712
  175.716539 -0.0330059178125 -0.00506432452938
  175.720012 -0.0409588349291 0.072639802363
  175.723484 -0.0205848686623 0.00778201632359
  175.726956 0.00324167932502 0.0081868223194
  175.730428 -0.0531365092188 0.102528537468
  175.733900 -0.00247097656195 0.0109574591433
  175.737373 0.043385516596 0.0712272518855
  175.740845 -0.0287063690551 0.0624404505816
  175.744317 -0.00640222778338 0.0335191750218
  175.747789 0.00219328795903 0.0543975115272
  175.751262 -0.0206652964056 0.0278423401279
  175.754734 -0.00822563022871 0.0523211149759
  175.758206 -0.012647982323 0.0437595891403
  175.761678 -0.0465254330578 0.0725208302955
  175.765139 0.0063000150732 0.0500463154956
  175.768611 -0.0475500071546 0.0695371511664
  175.772083 -0.0475356736599 0.0214411111876
  175.775556 -0.0752921507509 0.00378215357284
  175.779028 -0.0503480437073 0.0337596778927
  175.782500 -0.0576552783639 0.0666004591911
  175.785972 -0.0321732576197 -0.0188735143559
  175.789444 0.00384793431136 0.0300030216652
  175.792917 0.0035316813757 0.00586840748057
  175.796389 0.00619908652211 -0.00642673102455
  175.799861 -0.041413814868 0.0827900237407
  175.803333 0.0152037488816 -0.02787941814
  175.806806 -0.062890698233 0.0512871624974
  175.810278 -0.0432612391291 0.0273972993355
  175.813750 -0.02453043996 0.0657954841474
  175.817222 -0.0251716783526 0.0296129315853
  175.820694 0.00216378926536 -0.0360939850409
  175.824167 -0.00843435541223 0.00688066453846
  175.827639 -0.00913902389265 0.0021564698704
  175.831111 0.0339326417977 -0.00426319894707
  175.834583 -0.00117927658651 0.0108140427798
  175.838056 0.0896650296156 0.0742987164042
  175.841528 -0.00457693014747 0.00607006875026
  175.845000 -0.20698703891 -0.215404932978
  175.848472 -0.138482341 -0.184086467245
  175.851944 0.0719391171535 0.1075272598
  175.855417 0.215365863372 0.240258813388
  175.858889 0.196996584986 0.207349433152
  175.862361 0.233462788764 0.211225109049
  175.865347 0.226780280496 0.262292246441
  176.415440 1.28008857617 -0.46819917988
  176.418912 0.186301264413 -0.349034393196
  176.422384 0.145382625394 -0.359398498958
  176.425856 0.505795169498 0.427550726255
  176.429317 0.181237093404 0.215425483132
  176.432789 0.0283237190531 0.00456172491644
  176.436262 0.00166608087788 -0.0180579254918
  176.439734 0.0966727468744 0.177255645897
  176.443206 0.45518817774 0.491565047201
  176.446678 0.326916069631 0.715422380546
  176.450150 0.47833153629 0.658800620468
  176.453623 0.39853499292 0.256914779949
  176.457095 -0.00902780002503 -0.0285064206746
  176.460567 0.00237524347829 0.0411691475023
  176.464039 -0.0219915447563 -0.0322504761946
  176.467512 0.0298115952529 0.00317245470471
  176.470984 -0.0153396000829 0.024955892561
  176.474456 0.842979079308 0.159470523451
  176.476192 0.00550972471824 1.65080890196
  176.627558 -2.44082140872 4.31126170293
  176.630995 0.134970667044 0.745038291874
  176.634468 0.00990899505489 -0.00122041138387
  176.637940 -0.00267489791347 -0.00147932913577
  176.641400 -0.00294821214509 0.00395686353051
  176.644595 -0.00039647050565 -0.00647195959951
  176.651644 0.000598994469251 0.00302448331496
  176.655185 0.00992313052885 -0.00246543577755
  176.658657 0.347057565966 0.075369649856
  176.662130 0.644263245022 0.20820959562
  176.665602 0.65132261868 0.165749308957
  176.669074 0.690029892439 0.249629666259
  176.672546 0.650523130554 0.194668570238
  176.676019 0.505706498184 0.249666698554
  176.679491 -1.60702728374 -0.263202175702
  176.682963 -3.6798697722 -1.75797045945
  176.686435 -1.22322229959 0.0682340303317
  176.689907 0.705739050764 0.597779547777
  176.693380 0.0810327152137 0.321106867021
  176.696852 -0.0203043230907 -0.223261318908
  176.700324 -0.537629389324 -0.436081042914
  176.703796 -0.0276910447062 -0.147521807362
  176.707269 0.043801259761 -0.0835796608778
  176.710741 0.203316055098 0.0324693928769
  176.714213 0.561998430744 0.149777715299
  176.717685 0.578287921665 0.160502550608
  176.721157 0.585226582627 0.37938904237
  176.724630 0.536878041054 0.236205082564
  176.728102 0.0113675948045 -0.00170113064517
  176.731574 0.079028374019 -0.0272558562608
  176.735046 0.0968734600124 -0.0481891492692
  176.738519 0.0919136859026 -0.0444882625302
  176.741991 0.0893632332982 -0.0447114359603
  176.745463 0.0936768586138 -0.0458195802465
  176.748935 0.0135261038349 -0.0258135493436
  176.752407 0.000638310820239 -0.0027736621618
  176.755880 -0.00334343675565 -0.000665659745767
  176.759352 0.00386026070396 0.00355028756498
  176.762824 -0.0558673201082 0.077736506247
  176.766296 -0.00279632134042 0.00240377139557
  176.769769 -0.0398790841504 0.0557321211104
  176.773241 0.000729473724703 0.00295848794774
  176.776713 -0.036626686398 0.0440457583456
  176.780185 -0.00148938267603 0.00680471841279
  176.783657 -0.0018540756152 0.00765508775542
  176.787130 -0.036353059197 0.0384984345875
  176.790602 -0.00398192676666 0.00606524994084
  176.794074 -0.0332811406174 0.0448937641926
  176.797546 -0.00471143137412 0.0159767563457
  176.801019 -0.0381451562498 0.0512558081116
  176.804491 -0.00100304809015 -0.000258875176985
  176.807963 -0.0324318663952 0.0410132247808
  176.811435 -0.0254705597879 0.0347622376992
  176.814907 -0.0207295999028 0.0258135543547
  176.818380 -0.0139206385416 0.0241486614728
  176.821852 -0.0262007075214 0.0363534735871
  176.825324 0.00422493740609 0.00192307288075
  176.828796 -0.00106380255993 -0.00432678936046
  176.832269 3.03952322814e-05 0.00484466437237
  176.835729 -0.00261399014923 -0.00525146825267
  176.839201 -0.0709403731993 0.0568399600689
  176.842674 -0.00674772995527 -0.000184910860617
  176.846146 -0.0068995067614 0.00347622402114
  176.849618 0.00714307217192 0.000517765317919
  176.853090 -0.0764438018425 0.0522558093075
  176.856562 -0.0648612972805 0.0265154542401
  176.860035 -0.0336777577118 0.0175665322797
  176.863507 -0.0446186746464 0.0227803627952
  176.866979 -0.043191358058 0.0241863417616
  176.870451 -0.0602125318884 0.0271449159952
  176.873924 -0.0344973302208 0.0120558417226
  176.877396 -0.0839509125748 0.0417158935757
  176.880868 -0.00750755307448 -0.00136834049343
  176.884340 -0.0648001370791 0.0328022451286
  176.887812 -0.0240423766891 0.0116493854792
  176.891285 -0.00249238249579 -0.00129437616679
  176.894757 -0.0596955677126 0.0342454954258
  176.898229 -0.0296349993299 0.00721152448284
  176.901701 -0.00215797346073 -0.000591697787272
  176.905174 0.00240119453463 0.00110946530663
  176.908646 -0.00173250724044 0.00621300572746
  176.912118 -0.000182363930293 -0.00680452457396
  176.915590 -0.00155013819863 0.00196005537546
  176.919062 0.202454013439 0.106283717869
  176.922535 0.227139550319 0.128845914348
  176.926007 0.464641258448 0.188313272924
  176.929479 0.580928215541 0.0759244250565
  176.934155 0.740349406937 0.0638947864558
  176.937627 0.814352847904 0.0777365578238
  176.941100 0.848093067304 0.161755437395
  176.944572 0.757263831469 0.289422643418
  176.948044 0.703652644467 0.269000759031