PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-18:12:50
G01     122.9          14.3               24.4 +/-    2.26      61.7 +/-    2.26  0.130 / 0.080
G07     79.2           63.9               11.8 +/-    0.26      13.0 +/-    0.26  0.090 / 0.070
G08     47.3           35.4               11.0 +/-    1.47      17.3 +/-    1.47  0.030 / 0.040
G09     178.4          32.7               12.8 +/-    0.92      21.3 +/-    0.92  0.030 / 0.040
G11     111.7          38.4               12.8 +/-    0.59      19.1 +/-    0.59  0.030 / 0.030
G13     319.4          16.1               10.1 +/-    3.04      24.4 +/-    3.04  0.030 / 0.030
G17     199.9          19.6               14.7 +/-    1.39      32.8 +/-    1.39  0.210 / 0.340
G18     97.3           18.6               11.7 +/-    2.03      26.7 +/-    2.03  0.130 / 0.400
G28     277.8          51.8               13.0 +/-    2.15      16.1 +/-    2.15  0.080 / 0.230
G30     341.6          65.9               11.5 +/-    0.79      12.5 +/-    0.79  0.080 / 0.250