(meteorobs) RE: Origin of ZHR is elusive

[Roberto G.]

From: "drobnock" <drobnock at penn.com>

> Hi
> Rich's research would indicate the origin of the term "zenith hourly
> rate" may have been introduced into use some time between 1920 (work of
> Opik) and 1955 ( the publication of Sidgewick's work).
> 
> Although the exact origin is still not certain,  I am offering the
> following bit of information -- not that it is in the correct direction
> to finding an answer -- but using combination of phrases and available
> search engines the following may be useful.

CUT
> 
> As Richard stated,  it is possible the formula for ZHR may have been the
> product of  an unknow or a group working together.
> 
> George John Drobnock

Probably the idea for ZHR follow a need for to have standard
comparable observations and it's probably too that the
formula was wrote not in a time but in many times by many
peoples, but I think that the work of Opik must to see us
who wrote the formula, I think that too perhaps the ZHR
formula can to have in future some little modifications.
Best greetings.
Roberto Gorelli