PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-19:13:00
G01     92.6           30.7               11.3 +/-    0.80      19.5 +/-    0.80  0.040 / 0.080
G07     124.2          41.1               12.0 +/-    0.73      17.1 +/-    0.73  0.040 / 0.070
G11     70.1           40.6               10.8 +/-    0.40      15.6 +/-    0.40  0.090 / 0.120
G13     296.9          36.0               11.4 +/-    0.83      17.8 +/-    0.83  0.090 / 0.120
G17     211.7          51.4               13.2 +/-    0.93      16.4 +/-    0.93  0.040 / 0.060
G18     64.3           23.4                9.2 +/-    0.63      18.7 +/-    0.63  0.030 / 0.060
G19     212.8          25.1               14.4 +/-    1.59      28.1 +/-    1.59  0.040 / 0.080
G28     333.9          61.4                9.8 +/-    1.33      11.0 +/-    1.33  0.040 / 0.090
G30     99.5           76.1               11.6 +/-    0.74      11.9 +/-    0.74  0.060 / 0.130