Atmospheric Vortex Engine

Atmospheric Thermodynamics Programs

For the HP48SX scientific calculator

The Atmospheric Thermodynamic (AT) program calculates the thermodynamic properties of humid air, a wide range of atmospheric science parameters, and associated energy transfers.

The HP48SX scientific calculators came out in the 1990's and has not been surpassed. The popularity of the HP48SX led devotees to develop a HP48 emulators which can run on a personal computer. HP48SX emulators for IPod and IPad recently became available in the Apple Application store. The IPod/IPad apps have the advantage that the key can be pressed directly like on the original calculators. The emulators are approximately 100 times faster than the original calculators.  Thanks to: Sebastien Carlier, Christoph Giesslink, and Markus Gonser for producing the HP calculators emulators.  

Installation procedure for HP48SX calculator emulator

Emulator installation procedure by Vortex Engine - PDF (Rev. Aug 2010)

HP Emulator Download web page - Download "Emu48 1.50"; 
and download and convert "HP48SX Revision J R0M"

Atmospheric Thermodynamic Program Documentation

Program documentation -  PDF (Rev. December 2011)

Atmospheric Thermodynamic Program User Instructions

User Instructions - PDF .

Atmospheric Thermodynamic HP48SX Program Code - Installation Method 1 load AT1 object in an existing emulator

HP48SX Binary Object Program Code - December 2011 version - (139 KB).

Installation Procedure
1. Program 'AT1' can be used in HP48SX or HP48GX
2. Ensure that the calculator has a minimum of 140 kB of available memory
3. Drag the binary file in calculator window,
4. Save in Home directory as : 'AT1' ,

Notes:
Total HP48SX PC emulator memory can be increased from 30 kB to 292 kB by merging two 128 kB memory cards. 
Total HP48GX PC emulator memory can be increased from 128 kB to 259 kB by merging one 128 kB memory card.
The IPod/IPad HP48SX memory can only be increased from 30 kB to 158 kB by merging slot 1 (1 MERGE).
The IPod/IPad HP48GX memory can be increased from 128 kB to 256 kB by merging one memory card (1 MERGE) 
Program AT1 was written on the HP48SX but will also run on the HP48GX. The use of the HP48SX is recomended.