PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/30-15:27:50
G01     73.8           32.7               10.1 +/-    0.34      16.7 +/-    0.34  0.070 / 0.160
G07     135.1          29.7               10.6 +/-    1.40      18.7 +/-    1.40  0.050 / 0.130
G11     55.5           33.2                7.3 +/-    0.89      12.0 +/-    0.89  0.030 / 0.040
G13     277.6          38.8               12.1 +/-    1.24      18.0 +/-    1.24  0.040 / 0.050
G15     305.0          14.7                7.5 +/-    1.75      18.8 +/-    1.75  0.080 / 0.090
G17     226.2          63.8               12.2 +/-    0.77      13.4 +/-    0.77  0.080 / 0.090
G18     50.6           19.1                7.4 +/-    1.52      16.6 +/-    1.52  0.050 / 0.050
G19     220.9          40.2               13.2 +/-    0.41      19.2 +/-    0.41  0.050 / 0.060
G28     1.7            61.3                9.6 +/-    0.59      10.8 +/-    0.59  0.070 / 0.130
G30     132.1          62.8               11.1 +/-    0.89      12.3 +/-    0.89  0.070 / 0.120