PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-14:42:40
G01     115.2          19.7                9.5 +/-    2.17      21.0 +/-    2.17  0.050 / 0.080
G07     94.6           60.4               10.3 +/-    0.61      11.7 +/-    0.61  0.090 / 0.060
G08     44.1           30.0                8.0 +/-    1.16      13.9 +/-    1.16  0.070 / 0.080
G09     177.1          23.9               11.4 +/-    0.80      22.9 +/-    0.80  0.070 / 0.070
G11     101.6          42.0               10.4 +/-    0.55      14.7 +/-    0.55  0.030 / 0.040
G13     315.5          23.1                7.0 +/-    1.66      14.4 +/-    1.66  0.030 / 0.040
G17     202.4          26.2               10.7 +/-    2.20      20.3 +/-    2.20  0.100 / 0.230
G18     89.3           21.9                6.9 +/-    1.89      14.5 +/-    1.89  0.100 / 0.230
G28     290.2          55.2                7.8 +/-    1.81       9.2 +/-    1.81  0.070 / 0.140
G30     0.9            73.2                9.9 +/-    0.64      10.3 +/-    0.64  0.080 / 0.130