PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/31-21:43:00
G01     73.0           32.9               11.5 +/-    1.54      19.0 +/-    1.54  0.080 / 0.120
G07     135.9          27.7               13.4 +/-    1.36      24.7 +/-    1.36  0.090 / 0.110
G11     54.1           31.4               10.0 +/-    1.49      17.0 +/-    1.49  0.030 / 0.040
G13     276.5          38.5               11.6 +/-    0.86      17.4 +/-    0.86  0.040 / 0.050
G15     303.8          15.1                7.7 +/-    1.53      19.1 +/-    1.53  0.080 / 0.100
G17     228.9          68.6               12.8 +/-    0.85      13.7 +/-    0.85  0.100 / 0.080
G18     48.6           17.6                9.0 +/-    2.40      21.1 +/-    2.40  0.050 / 0.080
G19     221.9          39.9               15.5 +/-    1.30      22.5 +/-    1.30  0.050 / 0.080
G28     7.4            60.9               11.5 +/-    0.99      13.0 +/-    0.99  0.030 / 0.030
G30     133.2          63.0               13.9 +/-    0.47      15.4 +/-    0.47  0.030 / 0.030