on an hourly basis - перевод на Английский
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on an hourly basis - перевод на Английский

NUMBER OF METEORS A SINGLE OBSERVER WOULD SEE IN AN HOUR OF PEAK ACTIVITY FOR THE METEOR SHOWER
Zenith Hourly Rate; Zenith hourly rate; Zenithal Hourly Rate
  • All-sky view of the 1998 [[Leonids]] shower. 156 meteors were captured in this 4-hour image.

on an hourly basis      
volgens uren (berekening op basis van aantal werkuren)
fools rush in where angels fear to tread         
BRITISH POEM
Essay on Criticism; Fools rush in where angels fear to tread; Where Angels Fear To Tread (album); An essay on criticism; Essay On Criticism; An Essay On Criticism; A little learning is a dangerous thing; A little knowledge is a dangerous thing; Fools Rush In Where Angels Fear to Tread; A little learning; A little knowledge; To err is human, to forgive divine
de meester in zijn wijsheid gist,de leerling in zijn waan beslist
An Officer and a Gentleman         
  • Battery Kinzie, scene of "I got nowhere else to go!"
1982 FILM BY TAYLOR HACKFORD
An Officer and A Gentleman; Officer and a Gentleman; An Officer and a Gentlemen; Officer and a gentleman; Zack Mayo; An Officer & a Gentleman; An Officer And A Gentleman
Een Officier en een Heer

Определение

an education

Википедия

Zenithal hourly rate

In astronomy, the zenithal hourly rate (ZHR) of a meteor shower is the number of meteors a single observer would see in an hour of peak activity if it was at the zenith, assuming the seeing conditions are excellent (when and where stars with apparent magnitudes up to 6.5 are visible to the naked eye). The rate that can effectively be seen is nearly always lower and decreases the closer the radiant is to the horizon.

The formula to calculate the ZHR is:

Z H R = H R ¯ F r 6.5 l m sin ( h R ) {\displaystyle ZHR={\cfrac {{\overline {HR}}\cdot F\cdot r^{6.5-lm}}{\sin(h_{R})}}}

where

H R ¯ = N T e f f {\displaystyle {\overline {HR}}={\cfrac {N}{T_{eff}}}}

represents the hourly rate of the observer. N is the number of meteors observed, and Teff is the effective observation time of the observer.

Example: If the observer detected 12 meteors in 15 minutes, their hourly rate was 48 (12 divided by 0.25 hours).

F = 1 1 k {\displaystyle F={\cfrac {1}{1-k}}}

This represents the field of view correction factor, where k is the percentage of the observer's field of view which is obstructed (by clouds, for example).

Example: If 20% of the observer's field of view were covered by clouds, k would be 0.2 and F would be 1.25. The observer should have seen 25% more meteors, therefore multiply by F = 1.25.

r 6.5 l m {\displaystyle r^{6.5-lm}}

This represents the limiting magnitude correction factor (Population index). For every change of 1 magnitude in the limiting magnitude of the observer, the number of meteors observed changes by a factor of r. Therefore, this must be taken into account.

Example: If r is 2, and the observer's limiting magnitude is 5.5, the hourly rate is multiplied by 2 (2 to the power 6.5–5.5), to know how many meteors they would have seen if their limiting magnitude was 6.5.

sin ( h R ) {\displaystyle \sin(h_{R})}

This represents the correction factor for the altitude of the radiant above the horizon (hR). The number of meteors seen by an observer changes as the sine of the radiant height.

Example: If the radiant was at an average altitude of 30° during the observation period, the observer's hourly rate will need to be divided by 0.5 (sin 30°) to know how many meteors they would have seen if the radiant was at the zenith.

Примеры употребления для on an hourly basis
1. His condition is being monitored on an hourly basis,» Verma told mediapersons outside the hospital here.
2. Advertisement Take for example workers who work on an hourly basis.
3. In 1''', men earned 13 percent more than their female colleagues on an hourly basis.
4. Updates on the count will then be released on an hourly basis throughout the night and on Monday.
5. "We are monitoring the situation on an hourly basis and are ready for any eventuality," the official said.