PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-19:42:50
G01     109.4          24.4               16.0 +/-    1.73      31.7 +/-    1.73  0.060 / 0.120
G07     102.7          60.4               15.5 +/-    0.95      17.5 +/-    0.95  0.070 / 0.150
G08     42.7           25.4               11.7 +/-    0.90      22.7 +/-    0.90  0.050 / 0.070
G09     175.7          16.2               20.1 +/-    2.82      48.5 +/-    2.82  0.040 / 0.090
G11     94.2           43.0               16.7 +/-    0.42      23.2 +/-    0.42  0.030 / 0.040
G13     311.6          26.9               13.5 +/-    1.34      25.3 +/-    1.34  0.030 / 0.040
G17     206.1          31.5               19.4 +/-    2.91      33.1 +/-    2.91  0.090 / 0.180
G18     83.4           24.0               13.8 +/-    0.68      27.6 +/-    0.68  0.090 / 0.150
G28     314.0          60.6               14.6 +/-    0.71      16.5 +/-    0.71  0.030 / 0.040
G30     21.1           77.2               14.7 +/-    0.58      15.0 +/-    0.58  0.030 / 0.050