PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/16-17:12:30
G07     331.5          58.1               12.0 +/-    0.64      13.8 +/-    0.64  0.040 / 0.040
G08     109.6          48.9               13.1 +/-    0.89      16.7 +/-    0.89  0.040 / 0.040
G09     220.5          81.2               12.3 +/-    0.36      12.4 +/-    0.36  0.140 / 0.310
G16     44.3           16.2                9.6 +/-    2.80      23.3 +/-    2.80  0.150 / 0.480
G23     152.7          49.7               13.4 +/-    0.53      16.9 +/-    0.53  0.060 / 0.070
G27     64.6           35.9               11.2 +/-    1.60      17.5 +/-    1.60  0.060 / 0.060
G28     230.9          19.5               12.9 +/-    2.06      28.6 +/-    2.06  0.030 / 0.030
G30     296.9          31.7               12.3 +/-    2.27      20.8 +/-    2.27  0.030 / 0.030