PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/08-19:27:40
G01     122.5          14.6               15.4 +/-    2.84      38.7 +/-    2.84  0.030 / 0.040
G07     79.3           64.2               13.7 +/-    0.40      15.0 +/-    0.40  0.020 / 0.040
G08     46.7           34.4               11.2 +/-    1.10      17.9 +/-    1.10  0.100 / 0.080
G09     178.2          31.9               13.7 +/-    1.17      23.1 +/-    1.17  0.080 / 0.080
G11     110.8          38.6               15.3 +/-    0.93      22.8 +/-    0.93  0.070 / 0.080
G13     319.3          16.5               11.6 +/-    1.78      27.8 +/-    1.78  0.070 / 0.120
G17     199.9          20.7               16.3 +/-    3.88      35.3 +/-    3.88  0.140 / 0.330
G18     96.3           18.8               13.4 +/-    2.16      30.4 +/-    2.16  0.150 / 0.400
G28     279.0          52.4               15.2 +/-    2.62      18.6 +/-    2.62  0.030 / 0.030
G30     341.3          65.8               12.8 +/-    0.98      13.9 +/-    0.98  0.040 / 0.030