PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/28-19:57:50
G07     341.4          60.8               12.4 +/-    0.71      14.0 +/-    0.71  0.030 / 0.040
G08     95.6           54.2               12.4 +/-    1.06      14.9 +/-    1.06  0.040 / 0.050
G09     187.3          68.1               12.5 +/-    0.35      13.4 +/-    0.35  0.050 / 0.080
G11     143.9          16.2               17.8 +/-    4.30      43.0 +/-    4.30  0.070 / 0.060
G23     156.2          32.4               13.2 +/-    1.44      22.1 +/-    1.44  0.040 / 0.040
G27     49.5           27.8                9.9 +/-    2.26      18.1 +/-    2.26  0.030 / 0.050
G28     242.6          34.6               14.7 +/-    2.46      23.5 +/-    2.46  0.090 / 0.150
G30     308.5          41.3               11.8 +/-    0.90      16.8 +/-    0.90  0.100 / 0.100