PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/19-22:27:40
G07     56.8           67.9               10.8 +/-    0.60      11.6 +/-    0.60  0.030 / 0.030
G08     51.1           39.4                8.8 +/-    1.37      12.9 +/-    1.37  0.030 / 0.030
G09     178.4          38.9               12.9 +/-    0.86      19.1 +/-    0.86  0.360 / 0.290
G11     118.8          34.6               13.2 +/-    0.94      21.2 +/-    0.94  0.170 / 0.220
G17     198.6          14.4               15.1 +/-    5.64      38.0 +/-    5.64  0.110 / 0.150
G18     102.1          15.5               11.3 +/-    2.61      27.7 +/-    2.61  0.070 / 0.120
G23     161.3          11.3               13.3 +/-    1.51      36.0 +/-    1.51  0.070 / 0.070
G27     38.1           11.2                8.6 +/-    3.47      23.4 +/-    3.47  0.060 / 0.070
G28     269.1          49.0               11.9 +/-    4.07      15.1 +/-    4.07  0.050 / 0.070
G30     329.8          58.6               10.1 +/-    0.28      11.6 +/-    0.28  0.050 / 0.040