Solar

Solar position and clear-sky irradiance

Solar azimuth, altitude and zenith plus Direct, Diffuse and Global Horizontal Irradiance under clear skies. NREL SPA-equivalent computation on JPL DE421, irradiance from the Bird Clear Sky Model.

get/v1/solar/

Request

  • Base URL: https://thirdtrail.life
  • URL: https://thirdtrail.life/v1/solar/
  • Auth: one of:
    • HTTP bearer
    • API key in cookie sessionid

Query parameters

auto_elevationboolean

Look the elevation up from the coordinates. Paid plans only.

elevationnumber double

Metres above sea level, -500 to 9000. The differentiating input: sunrise at 2000 m is measurably earlier than the sea-level answer most APIs return. Omit to use auto_elevation, or default to 0.

includestring

Comma-separated sections, e.g. position,irradiance.

latnumber double required

Latitude in decimal degrees, -90 to 90.

lonnumber double required

Longitude in decimal degrees, -180 to 180.

timestampstring

Instant to evaluate, ISO 8601, e.g. 2026-06-21T12:00:00Z.

tzstring

IANA timezone for output timestamps, e.g. Europe/Dublin.

Response

No response body

Changes

No recorded changes to this operation across all 1 revision of this API.