PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-18:58:00
G01     111.7          22.3               11.8 +/-    1.93      24.7 +/-    1.93  0.040 / 0.050
G07     103.1          56.0               12.8 +/-    0.80      15.0 +/-    0.80  0.030 / 0.030
G08     42.5           24.3               10.2 +/-    1.69      20.2 +/-    1.69  0.040 / 0.050
G09     176.5          19.8               12.3 +/-    2.10      27.2 +/-    2.10  0.070 / 0.060
G11     94.7           42.6               12.8 +/-    1.10      17.9 +/-    1.10  0.030 / 0.030
G13     313.1          25.9               10.0 +/-    2.23      19.1 +/-    2.23  0.020 / 0.030
G17     203.0          32.8               13.0 +/-    1.34      21.5 +/-    1.34  0.120 / 0.220
G18     83.8           22.8                9.0 +/-    1.55      18.5 +/-    1.55  0.100 / 0.220
G28     299.2          57.5               11.0 +/-    1.02      12.8 +/-    1.02  0.100 / 0.160
G30     10.0           75.6               12.5 +/-    0.88      12.9 +/-    0.88  0.090 / 0.200