PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-19:12:40
G01     90.4           31.3               13.4 +/-    0.91      22.9 +/-    0.91  0.030 / 0.030
G07     125.8          39.5               15.1 +/-    1.71      22.1 +/-    1.71  0.030 / 0.020
G11     67.9           39.8               12.5 +/-    1.41      18.2 +/-    1.41  0.030 / 0.070
G13     294.7          36.7               11.1 +/-    4.07      17.1 +/-    4.07  0.040 / 0.060
G17     213.0          53.3               17.0 +/-    0.53      20.6 +/-    0.53  0.060 / 0.040
G18     62.4           23.1               11.5 +/-    0.82      23.5 +/-    0.82  0.080 / 0.040
G19     213.6          26.8               15.9 +/-    1.49      29.7 +/-    1.49  0.080 / 0.150
G28     337.7          61.5               11.8 +/-    0.72      13.2 +/-    0.72  0.110 / 0.200
G30     105.9          74.7               14.4 +/-    0.70      14.8 +/-    0.70  0.070 / 0.120