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               11.6 +/-    0.74      19.2 +/-    0.74  0.060 / 0.060
G07     135.9          26.9               14.1 +/-    1.44      26.5 +/-    1.44  0.050 / 0.060
G11     54.1           31.6               10.1 +/-    0.58      17.1 +/-    0.58  0.070 / 0.110
G13     276.4          38.5               11.9 +/-    0.77      17.8 +/-    0.77  0.050 / 0.110
G15     303.6          15.2                7.4 +/-    2.88      18.4 +/-    2.88  0.040 / 0.040
G17     228.7          67.9               14.1 +/-    1.16      15.1 +/-    1.16  0.030 / 0.040
G18     48.9           17.9                8.8 +/-    0.95      20.3 +/-    0.95  0.050 / 0.080
G19     221.9          40.3               15.3 +/-    1.29      22.1 +/-    1.29  0.080 / 0.080
G28     6.7            61.0                9.7 +/-    0.33      10.9 +/-    0.33  0.070 / 0.210
G30     133.3          62.1               13.3 +/-    0.67      14.8 +/-    0.67  0.080 / 0.190