PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-20:12:50
G01     72.8           32.8               11.0 +/-    2.03      18.1 +/-    2.03  0.070 / 0.110
G07     135.9          26.9               14.2 +/-    0.97      26.6 +/-    0.97  0.070 / 0.110
G11     54.1           31.6                9.8 +/-    1.65      16.6 +/-    1.65  0.040 / 0.040
G13     276.4          38.5               11.8 +/-    1.43      17.6 +/-    1.43  0.040 / 0.050
G15     303.6          15.2                7.9 +/-    1.36      19.7 +/-    1.36  0.030 / 0.040
G17     228.7          67.9               13.8 +/-    0.86      14.7 +/-    0.86  0.030 / 0.030
G18     48.9           17.9                9.5 +/-    3.08      22.1 +/-    3.08  0.080 / 0.120
G19     221.9          40.3               14.3 +/-    1.72      20.7 +/-    1.72  0.070 / 0.090
G28     6.7            61.0               10.7 +/-    1.21      12.0 +/-    1.21  0.100 / 0.220
G30     133.3          62.1               13.9 +/-    0.46      15.5 +/-    0.46  0.110 / 0.240