PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/31-18:27:40
G07     337.4          59.8               12.3 +/-    0.69      13.9 +/-    0.69  0.040 / 0.040
G08     101.9          50.6               14.2 +/-    0.57      17.8 +/-    0.57  0.030 / 0.040
G09     200.8          77.5               13.3 +/-    0.41      13.6 +/-    0.41  0.170 / 0.170
G11     146.3          12.3               17.9 +/-    1.89      47.4 +/-    1.89  0.290 / 0.200
G16     45.5           13.4                8.8 +/-    2.08      22.7 +/-    2.08  0.030 / 0.020
G23     154.8          45.6               15.1 +/-    1.01      20.2 +/-    1.01  0.030 / 0.030
G27     59.9           34.4               12.0 +/-    1.83      19.3 +/-    1.83  0.070 / 0.080
G28     233.9          23.3               15.6 +/-    1.42      31.7 +/-    1.42  0.050 / 0.080
G30     300.1          34.0               10.3 +/-    1.72      16.7 +/-    1.72  0.090 / 0.090