PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/12-10:27:50
G01     71.5           32.3                4.1 +/-    0.61       6.9 +/-    0.61  0.040 / 0.060
G07     135.9          30.9                6.5 +/-    1.30      11.1 +/-    1.30  0.040 / 0.060
G11     55.3           33.7                2.8 +/-    0.67       4.5 +/-    0.67  0.040 / 0.090
G13     275.6          38.9                7.0 +/-    1.36      10.4 +/-    1.36  0.050 / 0.100
G15     304.9          14.3                1.0 +/-    2.46       2.7 +/-    2.46  0.030 / 0.050
G17     227.7          64.8                7.2 +/-    1.02       7.9 +/-    1.02  0.030 / 0.050
G18     49.8           18.9                2.5 +/-    0.89       5.6 +/-    0.89  0.070 / 0.100
G19     221.7          42.2                8.2 +/-    0.66      11.5 +/-    0.66  0.090 / 0.120
G28     1.3            61.4                3.9 +/-    0.54       4.3 +/-    0.54  0.070 / 0.090
G30     133.6          65.3                5.2 +/-    0.81       5.7 +/-    0.81  0.060 / 0.090