PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-21:12:50
G01     38.0           10.7               11.7 +/-    4.57      32.0 +/-    4.57  0.140 / 0.210
G02     199.5          15.7               23.5 +/-    2.06      57.5 +/-    2.06  0.170 / 0.250
G06     172.1          48.2               18.9 +/-    0.87      24.4 +/-    0.87  0.100 / 0.130
G13     231.7          17.0               19.0 +/-    2.23      45.0 +/-    2.23  0.100 / 0.190
G17     7.9            66.7               14.4 +/-    0.60      15.6 +/-    0.60  0.040 / 0.050
G19     298.1          70.5               14.7 +/-    0.54      15.5 +/-    0.54  0.040 / 0.060
G24     313.3          25.5               12.6 +/-    1.07      24.4 +/-    1.07  0.050 / 0.070
G28     81.4           42.8               14.4 +/-    1.05      20.0 +/-    1.05  0.040 / 0.060
G30     156.1          19.4               18.2 +/-    2.21      40.7 +/-    2.21  0.100 / 0.230