PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-01:12:40
G01     73.5           33.2                6.5 +/-    1.09      10.8 +/-    1.09  0.040 / 0.040
G07     136.1          33.3                9.8 +/-    1.29      16.1 +/-    1.29  0.040 / 0.040
G11     57.4           34.5                4.8 +/-    0.90       7.7 +/-    0.90  0.050 / 0.070
G13     278.2          37.4                9.6 +/-    1.26      14.6 +/-    1.26  0.040 / 0.080
G15     303.9          15.3                6.0 +/-    2.01      14.7 +/-    2.01  0.030 / 0.050
G17     229.4          65.1                9.4 +/-    1.12      10.3 +/-    1.12  0.030 / 0.050
G19     222.7          40.3               10.3 +/-    1.51      14.9 +/-    1.51  0.050 / 0.100
G28     16.8           59.6                6.5 +/-    0.38       7.4 +/-    0.38  0.050 / 0.080
G30     132.9          59.6                8.6 +/-    1.00       9.9 +/-    1.00  0.080 / 0.060