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               14.7 +/-    1.00      29.1 +/-    1.00  0.040 / 0.040
G07     102.7          60.4               15.9 +/-    0.83      18.0 +/-    0.83  0.030 / 0.040
G08     42.5           24.3               11.4 +/-    1.60      22.7 +/-    1.60  0.050 / 0.140
G09     175.4          15.8               16.7 +/-    4.03      40.7 +/-    4.03  0.060 / 0.140
G11     93.4           42.8               16.3 +/-    0.46      22.6 +/-    0.46  0.050 / 0.060
G13     311.5          27.0               13.8 +/-    1.63      25.7 +/-    1.63  0.040 / 0.060
G17     205.8          32.6               15.8 +/-    1.59      26.2 +/-    1.59  0.040 / 0.060
G18     83.3           24.0               13.4 +/-    0.48      26.8 +/-    0.48  0.040 / 0.080
G28     313.7          60.6               14.6 +/-    0.60      16.5 +/-    0.60  0.030 / 0.040
G30     17.6           77.0               16.7 +/-    0.56      17.1 +/-    0.56  0.030 / 0.040