PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-18:12:50
G01     109.4          24.3               16.7 +/-    1.70      33.2 +/-    1.70  0.080 / 0.150
G07     102.7          60.4               16.2 +/-    0.71      18.3 +/-    0.71  0.090 / 0.140
G08     42.5           24.3               12.0 +/-    2.50      23.9 +/-    2.50  0.030 / 0.020
G09     175.4          15.8               14.9 +/-    1.65      36.3 +/-    1.65  0.030 / 0.020
G11     93.4           42.8               16.7 +/-    0.83      23.3 +/-    0.83  0.050 / 0.060
G13     311.5          27.0               13.9 +/-    1.86      26.0 +/-    1.86  0.040 / 0.050
G17     205.8          32.6               16.1 +/-    1.10      26.7 +/-    1.10  0.100 / 0.150
G18     83.3           24.0               13.7 +/-    1.42      27.3 +/-    1.42  0.090 / 0.140
G28     313.7          60.6               13.9 +/-    0.99      15.7 +/-    0.99  0.050 / 0.070
G30     17.6           77.0               15.7 +/-    0.53      16.1 +/-    0.53  0.070 / 0.060