Spaceway 3 "Hughes KA" coverage maps

[dirkleearm]

Tate if someone moves to my area, can I just recommision the modem to their new location without having to notify hughes?
Also, I assume you just guess on the postitioning of the squinter on the raven dish for azimuth settings?

[HCI]

Tate if someone moves to my area, can I just recommision the modem to their new location without having to notify hughes?
Also, I assume you just guess on the postitioning of the squinter on the raven dish for azimuth settings?

PM me your email address and I can send you a PDF on exactly how to do it. Or if you have access to vanative you can find it there. These are the steps in short. From FSB_080721-01A - Moving or Swapping a HN9xxx IDU.

"This Field Service Bulletin (FSB) describes how to move or swap and HN9X00 IDU (ST)
after it has been activated.

To move an HN9X00:
Complete the following process to move just an existing (activated) indoor unit (IDU).

1. Call TAG at xxx-xxx-xxxx. They will need the ST Name/SAN.
2. TAG will need to ‘Enable’ the ‘Re-Location Status’ function in DSS.
3. The unit can now be moved and installed at new location, using the same SAN & PIN
4. Once installed at the new location, you must perform the antenna pointing process using the new locations
parameters, based on the new GPS co-ordinates.
5. Once the parameters have been entered, repoint the antenna, and re-register the IDU.

To swap an HN9X00 with another unit:
If it has been determined that only the current IDU needs to be replaced, the following must be completed:
1. Call TAG at xxx-xxx-xxxx. They will need the ST Name/SAN.
2. TAG will need to ‘Enable’ the ‘Replacement Status’ function in DSS.
3. Install the new IDU.
4. Type 169.254.0.1 (Factory Default IP address) in the browser to access the SCC home page."

Also this is from: HNTR0083 HN9X00 Installation and Commissioning
Module 5: Troubleshooting

"If the antenna is installed less than 500 feet from where the original unit was installed, use the same GPS parameters and re-point the antenna. Re- registration is not required, and probing is completed by the system automatically.
Probing is similar in purpose to the ranging function in Ku-band antenna installations
Probing is used to determine the required timing and power offsets from nominal values, the terminal has to apply for optimal operation
If the antenna is installed more than 500 feet from where the original unit was installed, enter new GPS parameters and use those to repoint the antenna. Re-registration is required, and probing is completed by the system automatically. During the re-registration process, the HN9X00 should retain information previously obtained by probing."

As far as the Raven squinter. If you look on the feedhorn of the Raven you will see 4 notches. These notches will align with the notches on the squinter. If you leave the mormon clamp loose enough to rotate the feedhorn you can rotate it so the notches on the feedhorn and the squinter are align and the level on the squinter is horizontal on the bottom. When this is level you can then tighten the mormon clamp and rotate the squinter 90 degrees so the notches will align and this gives you the same position as the Prodelin.

[HCI]

Here are some pics.

[bajadudes]

Interesting...500 ft that's pretty tight.

As a matter of semantics and purely for the technical exercise there is a way to move many miles within a cell and still not have to change anything.

It's a trick we used to use in the old days to get satellite modems with a fixed delay set by the NOC to work thousands of miles away in other countries like Mexico.

Think about it.

If you stretch an imaginary string from the satellite to a given point on the earth, you can scribe a curved line on the earth and every point along that line will be equidistant to the satellite and have the same exact distance/delay.

You used to be able to use a Brownsville TX address and get a modem pointed at 101 to work in cabo san lucas Baja MX. With the new auto ranging modems it's a moot point.

Of course now with the new spot beamed cells the scribed curve is only valid inside the cell where the modem was originally commissioned. Still it should work anywhere along the line inside that cell.

Take the location 78.43' and plot a curve from the orbital location of 95 degrees where spaceway 3 sits. Every single one of these long/lat pairs will be exactly the same distance to the satellite (37395.07 KM) I am using an increment of .01 each time I calculate a pair:

-78.44 35.42
-78.45 35.43
-78.46 35.43
-78.47 35.44
-78.48 35.44
-78.49 35.45
-78.50 35.45
-78.51 35.45
-78.52 35.46
-78.53 35.46
-78.54 35.47
-78.55 35.47
-78.56 35.47
-78.57 35.48
-78.58 35.48
-78.59 35.49
-78.60 35.49
-78.61 35.49
-78.62 35.50
-78.63 35.50
-78.64 35.51
-78.65 35.51
-78.66 35.52
-78.67 35.52
-78.68 35.52
-78.69 35.53
-78.70 35.53
-78.71 35.54
-78.72 35.54
-78.73 35.54
-78.74 35.55
-78.75 35.55
-78.76 35.56
-78.77 35.56
-78.78 35.56
-78.79 35.57
-78.80 35.57
-78.81 35.58
-78.82 35.58
-78.83 35.58
-78.84 35.59
-78.85 35.59
-78.86 35.60
-78.87 35.60
-78.88 35.60
-78.89 35.61
-78.90 35.61
-78.91 35.62
-78.92 35.62
-78.93 35.63
-78.94 35.63
-78.95 35.63
-78.96 35.64
-78.97 35.64
-78.98 35.65
-78.99 35.65
-79.00 35.65
-79.01 35.66
-79.02 35.66
-79.03 35.67
-79.04 35.67

The formula to do the calculation is as follows

first calculate the distance to the sat with this:
=(SQRT((6378144*6378144)+(42164244*42164244)-(2*(6378144*42164244*(COS(E23*PI()/180))*(COS(ABS((F23*PI()/180)-(E20*PI()/180)))))))/1000)

Where E23 = lattitude expressed as xx.xx
Where E20 = satellite orbital location expressed as xxx.xx
Where F23 = Longitude expressed as xx.xx

Pick a starting longitude expressed as xx.xx

For each equidistant latitude:
=DEGREES(ACOS(((E25*1000*E25*1000)-(6378144*6378144)-(42164244*42164244))/(-537859000000000*(COS(ABS(E20-C34)*PI()/180)))))

where E25 = the previously calculated distance
Where E20 = satellite orbital location expressed as xxx.xx
Where C34 = longitude expressed as xx.xx

Increase the longitude by xx.xx and redo the above latitude calculation.

If anyone wants a copy of the spread sheet I set up to do this just shoot me an e-mail. It is going to be available for historical purposes on the new
www.starband-users

website soon. it even has a way to plot the curve on a USGS map and display it. We did hundreds of sites like this before the secret to our success got out.

[dirkleearm]

Thanks Tate, missed that FSB. I thought the feedhorn only had one position that it could be set. I shall check it out on the next one. Thanks again.
Bajadudes, must have spent some time figuring that out, very cool. Your link takes me to a search page??

[bajadudes]

It did take a bit to perfect the math and get it as formulas into a spreadsheet, Wife is a math major, 3rd in her graduating class at NC State so that helps. We were quite amazed when the theory actually bore fruit and it worked!

try this link


The new Starband-Users home

[jamesjoy2]

My Distributor got me a KA Installation Tool kit for 60 bucks, DAPT and Squinters included, no 22k filters for ku use, but what the heck, good deal, right?

[RickT]

Re the pix in The Tate's original post: My uplink cell is 31, which agrees with the maps for central California. But my downlink microcell is 275, which on the maps seems to be focused on the eastern half of the Missouri-Arkansas border. Anyone have an explanation for that? Thanks.

[wad]

Re the pix in The Tate's original post: My uplink cell is 31, which agrees with the maps for central California. But my downlink microcell is 275, which on the maps seems to be focused on the eastern half of the Missouri-Arkansas border. Anyone have an explanation for that? Thanks.

just an early release of cell assignments, thats all.