PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/11-19:12:50
G01     123.5          13.9               18.0 +/-    2.26      46.1 +/-    2.26  0.070 / 0.100
G07     76.7           64.7               13.2 +/-    0.51      14.4 +/-    0.51  0.090 / 0.080
G08     47.4           35.5               12.0 +/-    1.24      18.8 +/-    1.24  0.030 / 0.030
G09     178.3          33.2               14.6 +/-    1.04      23.9 +/-    1.04  0.030 / 0.040
G11     112.3          38.0               15.1 +/-    0.90      22.6 +/-    0.90  0.110 / 0.070
G13     319.7          15.5               11.2 +/-    3.66      27.5 +/-    3.66  0.090 / 0.070
G17     199.7          19.4               16.1 +/-    1.90      36.0 +/-    1.90  0.120 / 0.350
G18     97.6           18.3               15.3 +/-    1.41      35.0 +/-    1.41  0.170 / 0.340
G28     277.1          51.7               13.6 +/-    2.42      16.9 +/-    2.42  0.040 / 0.030
G30     339.7          64.9               12.6 +/-    0.80      13.7 +/-    0.80  0.030 / 0.030