PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-18:58:10
G01     113.0          21.4               14.7 +/-    1.04      31.2 +/-    1.04  0.030 / 0.040
G07     100.9          57.1               13.5 +/-    0.52      15.8 +/-    0.52  0.030 / 0.040
G08     42.8           25.5               10.7 +/-    0.38      20.6 +/-    0.38  0.040 / 0.060
G09     176.7          21.2               13.1 +/-    3.02      27.9 +/-    3.02  0.030 / 0.050
G11     96.6           42.3               14.3 +/-    0.34      20.1 +/-    0.34  0.040 / 0.060
G13     314.0          24.9               12.5 +/-    1.90      24.4 +/-    1.90  0.040 / 0.070
G17     202.6          31.4               14.8 +/-    2.24      25.2 +/-    2.24  0.070 / 0.220
G18     85.3           22.5               11.8 +/-    1.20      24.4 +/-    1.20  0.070 / 0.230
G28     296.8          57.0               12.7 +/-    0.66      14.9 +/-    0.66  0.080 / 0.190
G30     5.4            74.7               12.4 +/-    0.69      12.8 +/-    0.69  0.080 / 0.170