Satellite Dish Pointing Calculator
Calculate satellite dish azimuth, elevation angle and slant range for geostationary satellites.
3
Inputs
Live
Math
2
Related
Enter parameters and click Calculate to view results
Formula & Theory
Uses geostationary satellite geometry based on observer latitude and longitude.This formula is used to calculate antenna parameters for satellite dish pointing calculator.
Overview
This satellite dish pointing calculator determines the azimuth, elevation angle, and slant range needed to aim a fixed dish antenna at a geostationary satellite from any observer location on Earth. It is built for HAM operators, VSAT installers, DTH/satellite TV technicians, and RF engineers who need precise heading and tilt values before physically mounting and aligning a dish.
Input Guide
Enter Observer Latitude, Observer Longitude, Satellite Longitude exactly in the units shown by this satellite dish pointing. Check the operating band, unit prefix, and decimal position before calculating; these are the inputs used by the formula.
- Observer Latitude — use °.
- Observer Longitude — use °.
- Satellite Longitude — use °.
Output Guide
The results describe the calculated satellite dish pointing values for the inputs you entered. Check each value against the available space, selected components, feed system, and operating conditions before making a final design decision.
How This Calculator Works
The Satellite Dish Pointing uses Uses geostationary satellite geometry based on observer latitude and longitude.. Supply Observer Latitude (°), Observer Longitude (°), Satellite Longitude (°) in the displayed units, then use the calculated values as the first engineering target for this gps & satellite design or analysis.
Design Notes
Because geostationary satellites sit in a fixed orbital slot at 35,786 km altitude directly above the equator, pointing angles depend entirely on the observer's latitude and longitude relative to the satellite's orbital longitude. Azimuth is measured clockwise from true north (not magnetic north — remember to correct for local magnetic declination when using a compass), while elevation is measured up from the local horizontal. Observers closer to the equator and closer in longitude to the satellite will see higher elevation angles; observers far north, far south, or far in longitude will see low elevation angles or, beyond a certain limit, no visibility at all.
Build and Tuning Notes
Always verify the calculated azimuth against true north, not your compass reading, since magnetic declination can shift the heading by several degrees or more depending on location. For low elevation angles (below roughly 10°–15°), double-check line-of-sight for obstructions like trees, buildings, or terrain near the horizon in the target direction, since even a clear calculated angle can be blocked in practice. Fine-tune final alignment using a signal strength meter or receiver lock indicator, since small installation errors (mount tilt, mast twist, or mounting surface not being level) can shift actual pointing by a degree or more from the theoretical value.
Frequently Asked Questions
What do azimuth and elevation mean for satellite dish pointing?
Azimuth is the horizontal compass direction to point the dish, measured in degrees clockwise from true north. Elevation is the vertical tilt angle above the horizon needed to aim at the satellite. Together these two angles fully define the direction from the observer to a geostationary satellite.
Why is my calculated elevation angle negative or very low?
A negative or near-zero elevation angle means the satellite is below or very close to the observer's horizon, so it is not visible from that location. This typically happens at high latitudes or when the difference between the observer's longitude and the satellite's orbital longitude is large, since geostationary satellites only remain visible within a limited range of the globe.
Do I need to correct for magnetic declination when pointing my dish?
Yes. The azimuth value calculated here is relative to true (geographic) north, but most handheld compasses point to magnetic north, which can differ by several degrees or more depending on your location. Check your local magnetic declination and adjust your compass heading accordingly, or use a GPS-based or true-north reference tool for best accuracy.
Why does slant range matter if I already know azimuth and elevation?
Slant range is the actual line-of-sight distance to the satellite, which increases at lower elevation angles even though the satellite's altitude stays fixed. This distance directly affects free-space path loss, so it is useful for confirming that your dish size, LNB gain, and signal chain provide enough link margin for a reliable connection at your specific location.
Alex Warren
B.Sc. in Electrical & Electronic Engineering (EEE)
Alex specialises in antenna design and wave propagation. His expertise helps ensure these calculators present practical RF concepts, useful design estimates, and clear engineering guidance for students, HAM operators, and wireless professionals.