PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/16-20:27:50
G01     78.3           32.9               11.5 +/-    1.25      18.9 +/-    1.25  0.060 / 0.100
G07     133.2          31.1               12.1 +/-    1.28      20.8 +/-    1.28  0.060 / 0.090
G11     57.6           34.4               11.9 +/-    1.92      19.0 +/-    1.92  0.040 / 0.050
G13     282.2          38.5                9.6 +/-    2.20      14.3 +/-    2.20  0.040 / 0.040
G15     307.5          14.0                8.5 +/-    1.68      21.5 +/-    1.68  0.060 / 0.110
G17     222.5          63.9               14.0 +/-    0.97      15.4 +/-    0.97  0.050 / 0.130
G18     52.6           19.8                9.8 +/-    3.06      21.7 +/-    3.06  0.110 / 0.080
G19     219.0          36.1               14.2 +/-    1.76      22.0 +/-    1.76  0.110 / 0.200
G28     358.3          61.4               11.4 +/-    0.81      12.7 +/-    0.81  0.030 / 0.030
G30     127.5          66.6               13.4 +/-    0.50      14.5 +/-    0.50  0.030 / 0.030