Work continues on the flight path including evaluations of the R99 placard analysis work. This mathematical work is simply too long and specialised to post, but Shutter is aware of the work and could include it in the Vault. The first evaluation of 99's placard analysis occurred in 2010 but was updated in May of 2019. The author of that work is a highly qualified person. He has done prior work on weather analysis in the Cooper case using weather data provided by the FBI. It's always nice to have qualified people willing to contribute, in an impartial objective way.
There is more being done based on prior WSHM interviews.
Stay tuned.
In both analyses, I used weather information provided by the National Weather Service and the airliner flight crew. Some of this information was also included in what is referred to as the "FBI Notes". Additional relevant information can be found on the Weather Underground site.
The latest analyses included measured winds aloft information obtained by Tom Kaye through the National Weather Service.
In analyzing the Portland area weather at the time the airliner passed through, in addition to everything else, I used a technique developed by National Weather Service personnel to evaluate the effects of humidity on the airliner performance.
The end result of all of the above is that the atmospheric density in the Portland area, and in fact all over the northwest that evening, was about two percent above standard atmosphere values.
In all of this, I let the facts speak for themselves and do not have an agenda or suspect. There would be no problem here if some other people on this site did the same.
