#   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 0.22376002765 -0.0850806839943
   71.083391 0.256777031505 -0.0575363360521
   71.086863 0.110323218387 -0.0594700910335
   71.090336 0.119417100597 -0.0137010681375
   71.093808 0.00128550045589 -0.0268363304713
   71.097280 -0.00448031730704 0.00875600415205
   71.100752 -0.123918018038 0.202432683354
   71.104225 0.109361953874 0.581109611202
   71.107697 -0.0459246714884 0.601634319916
   71.111169 -0.171069254601 0.617777133056
   71.114641 -0.129234934034 0.651773673202
   71.118113 -0.135312883217 0.653275264116
   71.121586 -0.153875856993 0.577000402209
   71.125058 -0.0300243068354 0.718622354166
   71.128530 0.0526440225948 0.706063377809
   71.132002 -0.179578740221 0.6045789731
   71.135475 -0.239489578608 0.641493884631
   71.138947 -0.144614633586 0.600250888449
   71.142419 -0.244514851904 0.561483741732
   71.145891 -0.299552350069 0.601957259057
   71.149363 -0.240252303953 0.520636232603
   71.152836 -0.3288229412 -0.281347411979
   71.156308 -1.06138287969 -4.03589729023
   71.159780 -1.42581458863 -4.78884425815
   71.163241 -1.30324795536 -4.76403862923
   71.166713 -1.05772457015 -4.76211219659
   71.170185 -0.876962060736 -4.73000318239