PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/31-18:42:40
G07     349.7          63.0               12.7 +/-    0.44      14.1 +/-    0.44  0.030 / 0.040
G08     90.0           51.9               14.9 +/-    1.24      18.3 +/-    1.24  0.030 / 0.040
G09     188.7          70.4               12.8 +/-    1.00      13.5 +/-    1.00  0.140 / 0.170
G11     141.9          16.7               14.5 +/-    4.52      34.6 +/-    4.52  0.080 / 0.120
G23     157.0          38.3               14.0 +/-    0.74      21.0 +/-    0.74  0.030 / 0.030
G27     53.0           31.0               11.1 +/-    1.22      19.0 +/-    1.22  0.030 / 0.030
G28     239.0          28.8               15.6 +/-    1.44      28.0 +/-    1.44  0.100 / 0.090
G30     305.6          38.7               12.3 +/-    1.20      18.3 +/-    1.20  0.110 / 0.090