PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-18:43:00
G01     117.8          18.1               12.7 +/-    1.40      29.1 +/-    1.40  0.030 / 0.040
G07     91.6           60.6               12.6 +/-    0.80      14.3 +/-    0.80  0.030 / 0.040
G08     44.4           30.1                9.2 +/-    1.15      16.0 +/-    1.15  0.110 / 0.060
G09     177.5          26.4               11.3 +/-    1.48      21.4 +/-    1.48  0.080 / 0.070
G11     103.9          40.9               11.9 +/-    0.59      17.1 +/-    0.59  0.040 / 0.030
G13     316.9          20.9                9.5 +/-    2.23      20.3 +/-    2.23  0.040 / 0.030
G17     201.1          25.9               12.5 +/-    1.57      23.9 +/-    1.57  0.130 / 0.420
G18     91.0           21.0               11.7 +/-    2.33      25.0 +/-    2.33  0.240 / 0.380
G28     287.5          54.8               12.1 +/-    1.93      14.4 +/-    1.93  0.100 / 0.260
G30     352.1          70.7               11.0 +/-    0.57      11.6 +/-    0.57  0.080 / 0.250