NGS Calibration set-up Reference Antea Rb ose 04/1603 12540Lec17 Typical calibration results Two types of information given Phase center Position"relative to physical point on antenna(ARP--normally base of pre-amplifier) Elevation angle dependent deviations of phase 13"Micro Centered with Ground Plane NGS( 4)01/1012 15-:s1:2-4-2.7- 6=3.94.0 04/1603 12540Lec1704/16/03 12.540 Lec 17 19 NGS Calibration set-up 04/16/03 12.540 Lec 17 20 Typical Calibration results • • TRM 36569.00+GP NGS ( 4) 01/10/12 .0 -.3 63.2 .0 .7 1.4 2.3 3.1 3.9 4.6 5.2 5.6 5.9 5.9 5.6 -.9 -.8 44.6 .0 -.9 -1.5 -1.9 -2.2 -2.4 -2.7 -3.0 -3.3 -3.6 -3.9 -4.0 -3.8 .. 4 MEASUREMENTS .3 1.3 .1 .0 .1 .1 .1 .1 .2 .2 .2 .2 .1 .1 .1 .4 .6 .3 .0 .3 .5 .6 .7 .6 .6 .5 .5 .5 .5 .5 • Two types of information given: “Phase center Position” relative to physical point on antenna (ARP--normally base of pre-amplifier) Elevation angle dependent deviations of phase: 13" Micro Centered with Ground Plane 5.0 .. RMS mm (1 sigma) .1 .. .5 .. 10