#   yearbase = 2016
#    refuv_inputfile='a_ex.gps',
#    refuv_source='nav',
#    ens_len=300,
#    bl_half_width=3,
#    pgmin=50,
#    rl_startbin=2,
#    rl_endbin=20
   71.072975        1e+38        1e+38
   71.076447        1e+38        1e+38
   71.079919 0.2621065347 -0.0871897001633
   71.083391 0.225196068841 -0.0871081522131
   71.086863 0.12749539017 -0.0139674452109
   71.090336 0.0584117161619 -0.0484975033776
   71.093808 0.0822784030968 -0.0101151511804
   71.097280 -0.0535187485481 0.0176050027815
   71.100752 -0.127930132924 0.196061337351
   71.104225 0.149771311825 0.584418093116
   71.107697 -0.0399309338886 0.594652487273
   71.111169 -0.19706069486 0.610196305811
   71.114641 -0.157147006235 0.681775972124
   71.118113 -0.116581471632 0.621037795359
   71.121586 -0.129164911373 0.583677303017
   71.125058 -0.0507989531603 0.715824733407
   71.128530 0.0520059698147 0.697353061343
   71.132002 -0.202313702934 0.651720368256
   71.135475 -0.16130766296 0.610123377418
   71.138947 -0.217639490363 0.618149174644
   71.142419 -0.242677760142 0.554052039286
   71.145891 -0.260917426432 0.585338415368
   71.149363 -0.273547836416 0.529458493076
   71.152836 -0.315169639322 -0.281426162574
   71.156308 -1.04046768026 -4.0634390033
   71.159780 -1.45816337647 -4.76179252932
   71.163241 -1.31537493156 -4.76809017668
   71.166713 -1.0358131028 -4.75296996997
   71.170185 -0.870975217389 -4.737391314