PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-17:28:10
G02     219.7          61.4               16.8 +/-    0.38      18.8 +/-    0.38  0.080 / 0.080
G06     50.2           70.9               15.4 +/-    0.54      16.2 +/-    0.54  0.070 / 0.080
G12     320.1          40.5               13.7 +/-    1.31      19.7 +/-    1.31  0.050 / 0.070
G17     62.7           27.4               11.7 +/-    0.90      21.6 +/-    0.90  0.050 / 0.080
G19     46.6           44.8               14.1 +/-    1.36      19.1 +/-    1.36  0.050 / 0.140
G24     262.3          40.5               16.7 +/-    0.99      24.2 +/-    0.99  0.050 / 0.120
G28     125.7          10.0               14.8 +/-    1.75      41.2 +/-    1.75  0.030 / 0.040