PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-17:12:40
G01     43.7           19.8                8.7 +/-    2.68      19.1 +/-    2.68  0.040 / 0.060
G06     176.0          32.3               13.3 +/-    1.44      22.1 +/-    1.44  0.040 / 0.060
G13     241.6          26.3               12.4 +/-    1.61      23.5 +/-    1.61  0.120 / 0.300
G15     275.6          14.0                9.3 +/-    1.57      23.7 +/-    1.57  0.250 / 0.400
G17     340.4          75.6               11.6 +/-    0.33      11.9 +/-    0.33  0.130 / 0.340
G19     262.5          66.9               12.3 +/-    0.85      13.3 +/-    0.85  0.130 / 0.300
G24     317.9          14.3                8.1 +/-    1.13      20.4 +/-    1.13  0.020 / 0.020
G28     57.0           53.4               11.4 +/-    1.14      13.8 +/-    1.14  0.030 / 0.030
G30     152.1          30.9               11.3 +/-    2.42      19.4 +/-    2.42  0.040 / 0.040