---
title: "Starlink Density"
method: GET
path: "/api/v1/frontier/starlink/density"
tags: ["Starlink Thermosphere Monitor"]
---

# Starlink Density

`GET /api/v1/frontier/starlink/density`

## Request

- Base URL: `https://www.deepmapai.com`
- URL: `https://www.deepmapai.com/api/v1/frontier/starlink/density`
- Auth: none declared

Compute current thermospheric density from Starlink orbit decay.

Uses the drag equation to invert the observed decay rate into
atmospheric mass density at the satellite altitude.

Parameters
----------
altitude_km : float
    Satellite altitude in km (default 550).
decay_rate_m_s : float
    Observed orbital decay rate in m/s.
drag_coeff : float
    Satellite drag coefficient (default 2.2).

**Pricing:** Included in subscription tiers (legacy list price: GET /api/v1/billing/pricing).

## Query parameters

- `altitude_km` number: Altitude in km (default 550, Starlink orbit)
- `decay_rate_m_s` number, required: Observed orbital decay rate in m/s from TLE differencing
- `drag_coeff` number: Satellite drag coefficient (default 2.2)
- `x_api_key` string, nullable

## Response `200`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/deepmapai/apis/deepmap-ai.md) · [All operations](https://skmtc.dev/deepmapai/apis/deepmap-ai/llms.txt) · [OpenAPI document](https://skmtc.dev/deepmapai/apis/deepmap-ai/revisions/dab995d977d0?raw)