HOW TO USE INCLINOMETER AND COMPASS

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Ex Member Ex Member	Jun 1^st, 2007 at 3:54pm HI ERIC, PLS IM HAVING DIFFICULTY MOVING FROM NSS7 SATELLITE TO AMC-12/NSS10 SATELLITE DUE TO THE PROBLEM THAT DEVELOPED IN �MY SPECTRUM ANALYZER. I THOUGHT I COULD USE INCLINOMETER AND COMPASS TO ACHIVE THIS. THE AMC-12/NSS10 IS 37.5 DEGREES AND AZIMUTH IS 267.8 AND WEST WHILE NSS7 IS 22 DEGREES WEST. HOPE TO GET AN ASIISTANT FROM YOU. BEST REGARDS, SAM OBOT.
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Eric Johnston

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Reply #1 - Jun 1^st, 2007 at 5:15pm

You don't give your location, but based on the azimuth angle of 267.8 deg for AMC12/NSS10 you are somewhere along a line through Aba in Nigeria and Bamenda in Cameroon. �Figures below are illustrative only based on my guesswork.

Your initial dish pointing for NSS7 at 22 W was perhaps:
NSS7 � Elevation = 52 � �Azimuth = 263.8 � �Pol = 78.9

Your new dish pointing for AMC12/NSS10 at 37.5W is perhaps:
NSS10 Elevation = 35 � �Azimuth = 267.8 � �Pol = 82

Elevation: to get to the new satellite you need to come down by 52 - 35 = �17 deg.

Azimuth: the new satellite is 267.8 - 263.8 = 4 deg to the right.

If you are using linear polarisation and still using the same polarisation on the new satellite then the feed needs turning 82 - 78.9 = 3.1 deg clockwise while facing the satellite. �Note you are near the equator and since your satellite is far to the west, your polarisation adjustment is very large, approaching 90 deg! �

Start by getting the exact pointing details, for your location, for both satellites, then work out the differences and apply them. �

ref: https://www.satsig.net/maps/lat-long-finder.htm
wxw
Best regards, Eric.

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Ex Member Ex Member	Reply #2 - Jun 4^th, 2007 at 11:50am Eric, Thanks for your good feedback. i forgot to give u the location. The location is inthe heart of town in port harcourt. Thanks. Sam
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Eric Johnston YaBB Moderator ★★★★★ Offline Posts: 2109	Reply #3 - Jun 4^th, 2007 at 1:44pm From https://www.satsig.net/maps/satellite-dish-pointing-west-africa.htm Elevation down from 55.7 to 38.5 (down 17.2 deg) Azimuth 265.4 to 269.1 (3.7 deg to the right) Polarisation 80.2 to 83.2 ( 3 deg futher clockwise) Best regards, Eric.
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esegbue

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Reply #4 - Jul 20^th, 2007 at 12:07pm

Hi Eric,
please am having problem with my site am in benin city nigeria i want to connect to amc-12/nss10 on 37.5w and i have a 1.8mdish 5watt buc please wat will be the elevation, polarization and azimuth
and please how do i take my readings using inclinometer and where to take the readings whether from the back of the dish or at the front
thank you

ESE

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Admin1

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Reply #5 - Jul 30^th, 2007 at 6:53pm

From https://www.satsig.net/maps/satellite-dish-pointing-west-africa.htm

Find Benin City, Nigeria, by dragging the mouse or double clicking. �Calculation results are:

Elevation 39.8 degrees. �Set using the up/down elevation scale on the back of the dish. �If no scale and you know the offset angle of the dish, then set the front of the dish vertical and and the beam elevation will the the same as the offset. �Tilt further backwards to make up a total of 39.8 deg. �If no scale and no understanding of offset then put a thin strip of wood over the top of the feed and under the bottom edge of the dish and adjust till this strip slopes at 39.8 deg (approx).
wxw �
Azimuth �267 �A little to the left of due east, (E= 270 deg).

Polarisation 80.8 � Start with the feed set for either vertical or horizontal receive polarisation (as told to you by the NOC). �Then turn 80.8 deg clockwise while facing the satellite.

See here on how to use a compass

Best regards, Eric.

« Last Edit: Oct 14^th, 2007 at 4:59pm by Admin1 »

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