How to align a dish for Alcomsat across Algeria and North Africa
Alcomsat-1 is Algeria’s communications satellite, positioned in geostationary orbit at approximately 24.8° west. Since it remains above the equator, a fixed dish in Algeria or elsewhere in North Africa can point toward it continuously once the mount has been set correctly. The required direction changes from one installation site to another, so copying an angle from a different city can produce weak or unstable reception.
Accurate alignment depends on four measurements: azimuth, elevation, polarization skew, and the visibility of the satellite along the line of sight. Terrain, buildings, trees, nearby dishes, and an incorrectly mounted pole can matter as much as the calculated direction. A signal meter or receiver is useful for final adjustment, but it should confirm a calculated starting point rather than replace one.
SatPointer combines a selected location with satellite orbital data and map information to estimate the pointing direction. Its satellite database can also help compare coverage and indicative dish sizes, which is useful when planning reception across Algeria, Morocco, Tunisia, Libya, Mauritania, or other North African locations.
Confirm the satellite and service you need
Begin by confirming that the intended service is carried by Alcomsat-1. The satellite may support different bands, beams, and transponders, and a dish designed for one service may not perform equally well on another. Check the current frequency, symbol rate, polarization, and FEC information supplied by the broadcaster or network operator before climbing onto a roof.
Alcomsat-1 is commonly associated with regional television, data, and communications services, but channel lineups and transmission parameters can change. A receiver scan based on outdated settings may appear to show an alignment problem when the real issue is an obsolete transponder list. Record the active parameters before beginning the installation.
Use SatPointer’s satellite search to select Alcomsat-1 rather than relying on a general west-facing estimate. The application calculates the relationship between your location and the satellite, helping distinguish Alcomsat from nearby geostationary satellites that may sit only a few degrees away in the sky.
Choose a clear installation point
Select a site with an unobstructed view toward the calculated direction. A low roof, balcony, wall bracket, or ground pole can work if the dish has a clear line of sight. Trees are particularly problematic because they grow, move in wind, and become more absorbent when wet. A dish that works in dry weather may lose margin during rain if foliage is close to the signal path.
The support must be rigid and vertical. A pole that leans by only a few degrees can make the elevation scale misleading and can introduce tracking errors if the bracket is adjusted. Check verticality on two sides of the mast with a spirit level before attaching the dish. Tighten wall fixings into sound masonry and consider wind exposure, especially on coastal buildings and tall rooftops.
Leave enough space to rotate and tilt the reflector safely. Make sure the feed arm, low-noise block, or LNB is not shadowed by a parapet or roof edge. Keep coaxial cable runs as short as practical, use weatherproof compression connectors, and create a drip loop so rainwater does not run directly into the connector or receiver.
Calculate azimuth, elevation, and skew
Azimuth is the horizontal direction measured around the horizon, while elevation is the upward angle from a level horizon. LNB skew is the rotation of the feed assembly needed to match the satellite’s polarization at your location. These values are linked, but changing one does not automatically correct the others.
The azimuth shown by an online calculator may be referenced to true north or magnetic north. A compass normally indicates magnetic north, and the difference varies across North Africa. Before using a compass, review this guide to calculate true north and apply the local magnetic declination. Keep the compass away from steel rails, vehicles, ladders, and the dish itself.
SatPointer can provide a site-specific pointing direction when you place the marker at the actual installation address. For a receiver dish, use the result for downlink reception. Uplink operators should use the corresponding transmit configuration and observe all licensing, power, and safety requirements. The satellite’s position in the southern sky will generally be relevant for North African sites, but the exact bearing and height above the horizon depend on longitude and latitude.
The following overview shows why a single angle cannot be used throughout the region. Values are intentionally general; obtain the exact figures for the installation coordinates before drilling or fixing the bracket.
| Installation area | Expected satellite direction | Typical elevation tendency | Main planning concern |
|---|---|---|---|
| Northern Algeria | South-west to west-south-west | Moderate to high | Buildings, hills, and magnetic variation |
| Central Algeria | South-west | Moderate | Long cable runs and roof wind exposure |
| Southern Algeria | South-west to west-south-west | Lower to moderate | Horizon clearance and heat |
| Northern Morocco and Tunisia | West-south-west to west | Moderate to high | Nearby orbital satellites and local obstructions |
| Libya and Mauritania | South-west to west-south-west | Moderate | Open horizons, mast stability, and cable protection |
Set the reflector and LNB
Start with the dish reflector aimed close to the calculated azimuth and elevation. Use the adjustment marks only as a rough guide because factory scales can be inaccurate, and some brackets are graduated for a different reference angle. A digital inclinometer placed on a suitable flat part of the mount can provide a more reliable elevation reference, provided the dish design is understood.
Set the LNB skew according to the calculator’s instruction and identify the direction from which the rotation is measured. Looking at the dish from the front and looking toward the dish from behind produce opposite descriptions of clockwise and counterclockwise movement. Mark the original LNB position before making adjustments so you can return to it if necessary.
Do not assume the dish’s centerline points exactly where the signal travels. Offset dishes appear to point higher than their physical face suggests, so judge the installation from the bracket geometry and the calculated elevation, not by sighting along the reflector surface. Keep the LNB at the correct focal depth and make sure its collar is secure without crushing the feed assembly.
Find the strongest stable signal
Connect the receiver or professional meter with a known-good cable and tune to a confirmed Alcomsat-1 transponder. Watch signal quality rather than signal strength alone. Strength can indicate that the LNB is powered or that noise is present, while quality is more useful for identifying a correctly demodulated carrier.
Loosen the azimuth bolts just enough to permit controlled movement. Sweep slowly through a small range around the calculated bearing, pause at each position, and allow the meter time to respond. Once a carrier appears, move in smaller increments and record the quality reading. Then make similarly small elevation adjustments and repeat the process.
After the best peak is found, adjust the LNB skew by a few degrees in either direction while monitoring quality. The correct polarization angle often produces a noticeable improvement and can reduce interference from the opposite polarization. Finally, recheck azimuth and elevation because tightening the bolts can move the reflector.
If several satellites are close together, a strong lock may belong to the wrong spacecraft. Verify the transponder identity, service name, frequency, and polarization. SatPointer’s co-located satellite planning information is useful when evaluating angular separation and avoiding a false lock near Alcomsat-1.
Protect alignment for long-term use
Once the signal is peaked, tighten every adjustment evenly rather than securing one bolt completely before the others. Recheck quality after tightening. A correctly aimed dish can still fail in strong wind if the bracket flexes or the mast rotates slightly.
Seal outdoor F-connectors with self-amalgamating tape or an appropriate weatherproofing system. Inspect the cable for sharp bends, sun damage, and water entry. In hot regions, allow for thermal expansion and avoid routing cable across surfaces that can become excessively hot.
Dish size should be selected from the service footprint, frequency band, required availability, and local weather margin. A larger reflector may improve fade resistance, but it also presents more wind load and demands a stronger mount. Treat database dish-size figures as planning estimates, then follow the broadcaster’s or network operator’s recommended specification.
Use a reliable installation routine
A careful sequence prevents most alignment errors:
- Confirm the Alcomsat-1 service, frequency, polarization, and symbol rate.
- Place the SatPointer location marker at the exact dish site, not merely the nearest town center.
- Check true-north reference, line of sight, mast verticality, and safe access before mounting.
- Peak quality with small azimuth, elevation, and LNB-skew adjustments.
- Verify the transponder identity, weatherproof the cable, and recheck the signal after tightening.
For multi-dish sites, document each reflector’s azimuth, elevation, skew, cable label, and receiver settings. This makes later maintenance easier and helps technicians distinguish an Alcomsat installation from adjacent satellite systems. Keep a screenshot or printed record of the calculated angles so the setup can be restored after storm damage or equipment replacement.
Use SatPointer to calculate the site-specific direction for your location, then complete the physical installation with a meter and confirmed service data. With a rigid mount, an unobstructed path, correct polarization, and a verified transponder, Alcomsat reception across Algeria and North Africa can be aligned accurately and maintained with confidence.