PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/07-19:27:50
G01     63.9           31.4               10.2 +/-    1.08      17.3 +/-    1.08  0.040 / 0.040
G07     139.7          19.9               13.2 +/-    2.82      29.2 +/-    2.82  0.040 / 0.040
G11     49.5           26.2                9.7 +/-    3.03      18.4 +/-    3.03  0.120 / 0.220
G13     266.4          37.2               14.2 +/-    1.27      21.7 +/-    1.27  0.140 / 0.250
G15     296.7          16.4               11.5 +/-    1.71      27.6 +/-    1.71  0.050 / 0.050
G17     244.6          73.9               14.9 +/-    0.44      15.4 +/-    0.44  0.050 / 0.050
G18     43.5           14.0                9.1 +/-    2.59      23.3 +/-    2.59  0.100 / 0.110
G19     228.0          47.6               13.8 +/-    1.99      18.0 +/-    1.99  0.080 / 0.130
G28     20.4           59.8               10.8 +/-    0.99      12.3 +/-    0.99  0.130 / 0.310
G30     140.5          54.0               13.3 +/-    0.46      16.0 +/-    0.46  0.150 / 0.270