PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/08-18:57:50
G01     78.1           32.9                9.6 +/-    1.00      15.9 +/-    1.00  0.030 / 0.050
G07     133.2          30.7               11.3 +/-    1.22      19.5 +/-    1.22  0.040 / 0.050
G11     57.7           34.6               10.4 +/-    1.58      16.7 +/-    1.58  0.060 / 0.090
G13     282.1          38.6                8.5 +/-    1.98      12.7 +/-    1.98  0.060 / 0.090
G15     307.4          14.0                8.2 +/-    2.11      20.9 +/-    2.11  0.030 / 0.040
G17     222.4          63.1               12.9 +/-    1.43      14.3 +/-    1.43  0.030 / 0.030
G18     52.9           20.0                8.7 +/-    2.30      19.1 +/-    2.30  0.110 / 0.240
G19     218.9          36.4               12.6 +/-    1.77      19.4 +/-    1.77  0.200 / 0.290
G28     357.5          61.4                9.7 +/-    0.94      10.9 +/-    0.94  0.080 / 0.100
G30     127.8          65.7               11.7 +/-    0.69      12.8 +/-    0.69  0.060 / 0.130