Geoid GEOCOL04 1.02 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The most popular version of the program 1.0. This free PC software can be installed on Windows XP/7/8/10/11 environment, 32-bit version. This free program is a product of Ashtech. The program is included in Multimedia Tools. We recommend checking the downloaded files with any free antivirus.
From the developer:
The Extract tool may be used to crop a geoid to the sole area needed in your application, thus reducing the size of the geoid file you need to download to your receiver. The use of the Extract tool is optional in this case as complete geoids may be downloaded to the receiver without any risk of going low in memory.
You may want to check out more software, such as TracyTools, which might be similar to Geoid GEOCOL04.