PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/09-19:58:00
G01     108.8          24.0               16.3 +/-    1.75      32.7 +/-    1.75  0.040 / 0.030
G07     107.3          54.2               13.1 +/-    0.69      15.7 +/-    0.69  0.030 / 0.030
G08     41.9           21.3               10.2 +/-    2.65      21.9 +/-    2.65  0.190 / 0.300
G09     175.9          16.8               19.4 +/-    2.97      46.0 +/-    2.97  0.190 / 0.350
G11     90.2           42.8               14.1 +/-    0.95      19.6 +/-    0.95  0.060 / 0.190
G13     311.0          28.0                9.4 +/-    2.19      17.2 +/-    2.19  0.080 / 0.150
G17     204.0          36.4               17.8 +/-    0.76      27.6 +/-    0.76  0.090 / 0.150
G18     80.2           23.3               11.6 +/-    1.05      23.6 +/-    1.05  0.090 / 0.180
G28     305.3          58.7               12.1 +/-    0.81      13.9 +/-    0.81  0.070 / 0.190
G30     19.5           77.3               11.8 +/-    0.64      12.0 +/-    0.64  0.070 / 0.140