PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-21:28:10
G01     38.1           10.8               11.3 +/-    2.44      31.0 +/-    2.44  0.050 / 0.080
G02     199.4          15.6               29.8 +/-    1.73      73.0 +/-    1.73  0.050 / 0.070
G06     172.2          47.9               19.4 +/-    1.29      25.2 +/-    1.29  0.180 / 0.310
G13     231.9          17.1               22.0 +/-    2.39      52.1 +/-    2.39  0.170 / 0.430
G17     7.2            66.9               15.4 +/-    0.90      16.6 +/-    0.90  0.110 / 0.270
G19     297.8          70.6               16.4 +/-    0.30      17.3 +/-    0.30  0.150 / 0.310
G24     313.4          25.3               14.7 +/-    2.63      28.5 +/-    2.63  0.100 / 0.210
G28     81.2           42.8               15.3 +/-    0.54      21.3 +/-    0.54  0.140 / 0.200
G30     156.0          19.4               22.6 +/-    2.37      50.3 +/-    2.37  0.040 / 0.050