---
title: "The energy differential intensity of a particle at a given zenith angle."
method: GET
path: "/parma/differential_intensity"
tags: ["parma"]
---

# The energy differential intensity of a particle at a given zenith angle.

`GET /parma/differential_intensity`

The differential intensity of a particle is a directional quantity that describes the number of particles per unit area, per unit solid angle, per unit energy, and per unit time. The API leverages the functionality of PARMA to calculate differential intensity distributions with energies in units of MeV and Intensity in units of /cm2/sr/MeV/s.

## Query parameters

- `altitude` number
- `atmospheric_depth` number
- `latitude` number, required
- `longitude` number, required
- `year` integer, required
- `month` integer, required
- `day` integer, required
- `particle` 'total' | 'e-' | 'e+' | 'mu+' | 'mu-' | 'gamma' | 'neutron' | 'proton' | 'alpha', required
- `angle` number, required

## Response `200`

Successful read of intensity operation

- object
  - `energies` object
    - `data` number[]
    - `units` string
  - `intensities` object
    - `data` number[]
    - `units` string

---

[API](https://skmtc.net/amentum/apis/aviation-radiation.md) · [All operations](https://skmtc.net/amentum/apis/aviation-radiation/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/amentum/aviation-radiation/versions/3ccdfd4584ac/schema)