PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-18:43:00
G01     103.7          26.6               12.9 +/-    1.11      24.3 +/-    1.11  0.040 / 0.070
G07     114.1          49.5               14.0 +/-    0.68      17.8 +/-    0.68  0.040 / 0.050
G08     41.6           17.6                9.9 +/-    2.74      23.2 +/-    2.74  0.030 / 0.050
G09     175.0          12.5               15.9 +/-    1.79      41.9 +/-    1.79  0.030 / 0.040
G11     83.3           42.9               14.2 +/-    0.74      19.7 +/-    0.74  0.030 / 0.020
G13     306.9          31.2               12.2 +/-    0.93      20.9 +/-    0.93  0.030 / 0.020
G17     206.2          40.9               15.6 +/-    1.03      22.3 +/-    1.03  0.090 / 0.150
G18     75.1           24.0               11.0 +/-    1.29      21.9 +/-    1.29  0.060 / 0.170
G28     314.0          59.8               13.2 +/-    0.84      15.0 +/-    0.84  0.060 / 0.170
G30     49.0           79.1               13.6 +/-    0.67      13.8 +/-    0.67  0.070 / 0.170