asim: Annular simulations

In AlexCast/apsfs: Monte Carlo code for simulation of atmospheric Point Spread Functions and spatially-resolved Spherical Albedo Functions

Annular simulations

Description

Contains the atmospheric point spread functions (APSFs) for nadir vieweing sensors, simulated for the different standard aerosol models of the 6SV radiative transfer code: maritime (mar), continental (con) and urban (urb). Simulations were carried out without Rayleigh contribution, and with an aerosol scale height of 2 km. The APSFs for Rayleigh alone (ray) are also available at four pressure levels: 1100 mbar (p1100), 1013.25 mbar (p1013), 750 mbar (p0750) and 500 mbar (p0500). Sensor was positioned at TOA, with nadir view angle and infinitesimal field of view. The vertical optical thickness for all aerosol simulations was 0.5, while for Rayleigh, was the Rayleigh optical thickness at the given surface atmospheric pressure at 450 nm. It is noted, however, that dependence os the normalized APSF on optical thickness is small. By construction, aerosol APSF have no pressure dependence. All simulations are for a sensor altitude of 800 km, but altitude dependence is only significant at altitudes lower than 10 km (aircraft, drones).

Usage

asim

Format

A list with the following components:

• mar: APSF simulation for the maritime aerosol type.

• con: APSF simulation for the continental aerosol type.

• urb: APSF simulation for the urban aerosol type.

• ray: A list with APSFs of Rayleigh scattering for different surface pressures.

  • p1100: Rayleigh APSF simulation at 1100 mbar.

  • p1013: Rayleigh APSF simulation at 1013.25 mbar.

  • p0750: Rayleigh APSF simulation at 750 mbar.

  • p0500: Rayleigh APSF simulation at 500 mbar.

Details

Simulations run with the annular accumulator geometry.

Source

Generated with the apsfs library.

AlexCast/apsfs documentation built on Feb. 1, 2024, 9:48 p.m.