#   yearbase = 2017
#    refuv_inputfile='a_ex.gps',
#    refuv_source='nav',
#    ens_len=300,
#    bl_half_width=3,
#    pgmin=50,
#    rl_startbin=2,
#    rl_endbin=20
   46.923681        1e+38        1e+38
   46.927153        1e+38        1e+38
   46.930625        1e+38        1e+38
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   46.937569 0.0312577884145 0.00749545147495
   46.941042 0.0779791380763 -0.0295689386359
   46.944514 0.125477428457 0.0324486522097
   46.947975 -0.0910084455835 -0.0116552557479
   46.951447 -0.0449360763989 -0.0170748785638
   46.954919 0.153937350406 0.0338361579265
   46.958391 0.154798278321 0.183433809984
   46.961863 -0.0856951771099 0.201339104428
   46.965336 0.340225406901 -0.281158198206
   46.968808 -0.300084337277 -0.0351931048398
   46.972280 -0.269198773919 -0.0133345635972
   46.975752 -0.0375839272221 -0.0678849111057
   46.979225 0.0873613889647 0.000638357324074
   46.982697 -0.0029830570806 0.00823248885938
   46.986169 0.11709813432 0.0223590080782
   46.989641 0.148332637299 0.0822903857016
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   47.007002 0.132456485036 -0.166302068759
   47.010475        1e+38        1e+38
   47.013947        1e+38        1e+38
   47.017419 -0.268323720789 0.00278456201878
   47.020891 0.00821450127163 -0.0040989597557
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   47.097280 -0.314905707944 -0.448762271711
   47.100752 -0.325438092081 -0.453146491338
   47.104225 -0.310682564625 -0.416122495043
   47.107697 -0.297685750892 -0.397046176777
   47.111169 -0.14149016079 -0.212408420878
   47.114641 -0.0899989681513 -0.146136388101
   47.118113 -0.0971282086021 -0.156888581311
   47.121586 0.016376602451 -0.0701040445504
   47.125058 0.110047459032 0.0142606304476
   47.128530 0.185847633756 0.126257475367
   47.132002 0.269613348556 0.195091150099
   47.135475 0.276140561186 0.227899775345