PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-21:28:10
G01     45.8           22.0                9.6 +/-    3.11      20.1 +/-    3.11  0.200 / 0.210
G06     178.4          27.6               13.4 +/-    1.14      24.8 +/-    1.14  0.170 / 0.260
G11     43.4           10.0               10.3 +/-    4.05      28.7 +/-    4.05  0.080 / 0.150
G13     244.4          27.9               11.0 +/-    2.46      20.2 +/-    2.46  0.080 / 0.190
G15     277.9          14.8                9.8 +/-    1.81      24.4 +/-    1.81  0.050 / 0.040
G17     341.3          76.4               12.8 +/-    0.67      13.1 +/-    0.67  0.040 / 0.040
G19     255.4          64.1               13.6 +/-    1.07      14.9 +/-    1.07  0.040 / 0.050
G24     318.1          13.2                8.6 +/-    1.94      22.3 +/-    1.94  0.030 / 0.050
G28     54.4           53.7               11.6 +/-    1.20      14.0 +/-    1.20  0.060 / 0.090
G30     151.5          34.7               12.7 +/-    1.02      20.3 +/-    1.02  0.060 / 0.120