PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/09-23:42:40
G02     205.7          43.7               14.4 +/-    1.36      19.7 +/-    1.36  0.100 / 0.140
G06     154.4          75.0               11.8 +/-    0.70      12.2 +/-    0.70  0.070 / 0.190
G12     310.5          19.1                7.9 +/-    2.30      17.8 +/-    2.30  0.050 / 0.040
G17     43.8           42.5                8.6 +/-    1.60      12.1 +/-    1.60  0.050 / 0.050
G19     16.2           60.3              -11.2 +/-    0.94     -12.6 +/-    0.94  0.030 / 0.020
G24     286.6          41.9               14.1 +/-    2.67      19.8 +/-    2.67  0.030 / 0.030
G28     107.9          29.4               13.1 +/-    0.99      23.3 +/-    0.99  0.080 / 0.120