ViaSat 8116 Series, Инструкция по установке и эксплуатации

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CONTOUR ALIGNMENT SPECIFICATION AND RECORD
FOR 16 AND 18 METER ANTENNA
Antenna size _________ meters. ViaSat program manager ____________________________
Customer _________________________________ Installation location _________________________________
5. REFLECTOR PANEL FINAL ALIGNMENT REFERENCE
Panel targets contain three 0.04 inch high white reference dots for theodolite sighting. The center of the middle dot is the
nominal setting reference; it is 0.25 inches above the reflector surface. The other two dots are centered 0.06 inches above and
below the main dot, for scaling the setting deviation.
The error in inches for a target in any row can be determined from the table by measuring the error in arc seconds. Also, a
compensation adjustment in arc seconds is listed for each row for a 0.01 inch error in theodolite elevation axis height.
Equivalent arc seconds
Target Error (inch)
Row
Panel Target
Location
Drill
Template
Arc
Length
16 Meter
Target
Angle
18 Meter
Target
Angle
+0.01 inch
Theodolite Ht
0.005 0.010 0.015
1 Tier 1 Outside 118.000 87-12-47 87-12-47 +17.7 9.6 19.3 28.9
2 Tier 2 Inside 125.000 86-26-06 86-26-06 +16.7 9.1 18.7 27.2
3 Tier 2 Outside 209.820 78-56-16 78-56-12 +9.8 5.2 10.5 15.7
4 Tier 3 Inside 216.820 78-24-37 78-25-07 +9.5 5.1 10.1 15.2
5 Tier 3 Midway 287.830 73-42-56 73-41-31 +7.1 3.8 7.5 11.3
6 Tier 3 Outside 340.650 70-46-58 70-40-41 +5.8 3.2 6.4 9.5
7 Tier 4 Inside 347.650 ▒▒▒▒ 70-18-22 +5.7 3.1 6.2 9.3
8 Tier 4 Outside 392.030 ▒▒▒▒ 68-06-04 +5.0 2.8 5.5 8.3
6. RMS ERROR CALCULATION
The RMS error of the target settings should be no
greater than 0.010 inches. To calculate the RMS, fill
in the table below. Count the number of occurrences
of each error and multiply that count by the square of
the error. Divide the sum of all these products by the
total number of targets, and take the square root. This
gives the RMS. The total number of targets is 528 for
a 16 Meter Antenna, and 720 for an 18 Meter
Antenna.
The total target RMS is __________ inch.
Error
Value
Number of
Occurrences
Error
Value
Squared
Multiply
column 2 x
column 3
0.000 0.0
0.005 0.000025
0.010 0.0001
0.015 0.000225
0.020 0.0004
0.025 0.000625
0.030 0.0009
Total N = Summation =
N
) x
n
(
= RMS
2
i
i
ε
∑
April 23, 2004 ViaSat 479821B, page 4