PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/30-15:28:00
G01     73.8           32.7                7.9 +/-    0.91      13.1 +/-    0.91  0.060 / 0.050
G07     135.1          29.7                9.6 +/-    1.10      17.0 +/-    1.10  0.060 / 0.070
G11     55.5           33.2                7.6 +/-    1.00      12.5 +/-    1.00  0.070 / 0.120
G13     277.6          38.8                9.7 +/-    2.07      14.5 +/-    2.07  0.060 / 0.140
G15     305.0          14.7                7.0 +/-    1.05      17.6 +/-    1.05  0.090 / 0.090
G17     226.2          63.8               12.1 +/-    0.92      13.3 +/-    0.92  0.080 / 0.080
G18     50.6           19.1                7.8 +/-    1.56      17.5 +/-    1.56  0.030 / 0.040
G19     220.9          40.2               11.1 +/-    1.64      16.1 +/-    1.64  0.040 / 0.040
G28     1.7            61.3                9.2 +/-    0.85      10.3 +/-    0.85  0.100 / 0.090
G30     132.1          62.8               10.8 +/-    0.45      12.0 +/-    0.45  0.060 / 0.100