ISS Passes Over Ottawa

Next ISS Pass Over Ottawa

Loading a forecast, not a live observation.

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Keep an Ottawa planning note tied to its reference point

This page's fixed observer comes from the YOW entry in PocketWorld's city directory. The coordinates and observer-altitude input appear with the forecast so that you can reproduce the settings in another tool. They are not obtained from browser geolocation and are not changed when you move around the interactive globe.

A useful shared note includes more than the words Ottawa and tonight. Keep the UTC calendar date, start time, predicted end and observer reference together. If you convert a time for a local reminder, convert its date too and name the time zone. That keeps the note understandable to somebody reading it from a different region.

Check freshness before relying on an old screenshot

The retrieval timestamp tells you when PocketWorld obtained the source response, not when somebody saw the station. Predictions can be served from a cache for up to an hour. A countdown is calculated from the device clock and does not establish that fresh data is arriving each second. Check that clock if its countdown disagrees with the UTC timestamp.

After an opportunity ends, the table can still contain later entries from the same retrieved schedule. An expired list is not proof that no future passes exist. Likewise, a partial list is not a complete absence-of-events report: the page explicitly marks when unusable source rows were omitted.

Use the initial compass direction and highest elevation together when deciding what to compare with your actual horizon. The prediction does not evaluate the accessibility of an observing place or the cloud above it. A row in the table is not an instruction to enter a restricted area or an assurance that the station will be seen.

The Canadian Space Agency and NASA links explain observation, while the weather and forecast-service links answer different questions. Retain these distinctions when sharing an Ottawa forecast: position, predicted viewing opportunity and a confirmed sighting are three separate kinds of information.

Observer settings and forecast scope

Reference: YOW, Ottawa, Canada. Latitude 45.3192°, longitude -75.6692°. Observer altitude input: 0 metres. This fixed input is not a measurement of the city's elevation or your location. The request asks N2YO for up to 10 days of visual passes with a minimum visible duration of 60 seconds. Results can be cached for up to one hour; the retrieval timestamp is shown with the table.

All table dates and times are UTC, not automatically converted to your local time zone. Keep the date when converting. The countdown depends on your device clock. A predicted start and end describe a pass window; the separately reported visible duration can be shorter. Maximum elevation is an angle above the horizon. An unknown magnitude is not a prediction of a faint pass.

When the table cannot answer your question

Read the status message before relying on the countdown. A partial list contains only the source entries that passed validation. An unavailable result provides no reliable schedule at all. The page makes one bounded request rather than repeatedly contacting the provider in the background. If loading fails, reloading makes another attempt; the source links below remain usable independently of that request. Closing or leaving the page stops its countdown timer.

Seeing the ISS from Ottawa

A forecast is not proof of visibility from your position. Sunlight on the station, a sufficiently dark sky, cloud and your local horizon all matter. The globe's position marker is not a confirmed sighting.

Observation and forecast sources

• Canadian Space Agency: how to see the space station — observation guidance.
• NASA Spot the Station FAQ — visibility and prediction fields.
• N2YO API documentation — forecast data, observer inputs and field definitions.
• Environment and Climate Change Canada: astronomy weather — a separate check of forecast sky conditions, not ISS position.