PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/12-21:43:00
G01     78.9           33.3               13.1 +/-    1.25      21.4 +/-    1.25  0.090 / 0.190
G07     133.2          37.6               15.0 +/-    0.57      22.8 +/-    0.57  0.100 / 0.190
G11     60.5           36.4               11.6 +/-    0.99      17.9 +/-    0.99  0.090 / 0.080
G13     283.5          37.5               12.4 +/-    1.08      18.8 +/-    1.08  0.100 / 0.100
G15     308.1          13.7               10.2 +/-    2.10      26.2 +/-    2.10  0.030 / 0.070
G17     223.5          58.1               14.6 +/-    2.26      16.9 +/-    2.26  0.050 / 0.070
G18     55.2           21.5               11.5 +/-    3.58      24.3 +/-    3.58  0.320 / 0.240
G19     219.7          35.2               16.8 +/-    1.84      26.6 +/-    1.84  0.350 / 0.290
G28     8.3            60.5               12.7 +/-    1.78      14.4 +/-    1.78  0.040 / 0.030
G30     127.2          66.0               14.4 +/-    0.65      15.6 +/-    0.65  0.040 / 0.030