Printer friendly

What does HM stand for?

HM stands for Hydrogen Maser

This definition appears somewhat frequently and is found in the following Acronym Finder categories:

  • Science, medicine, engineering, etc.

See other definitions of HM

Other Resources:
We have 48 other meanings of HM in our Acronym Attic

Samples in periodicals archive:

Summary: Smart Technology & Control Enhances Reliability & Maintenance-Free Operation T4Science, a Swiss company of the Orolia group, which is publically traded on the NYSE Euronext Paris index (NYSE Alternext Paris -- FR0010501015 -- ALORO), and a global leading supplier of high performance hydrogen maser clock references, today announced the warranty extension of its new iMaser 3000 product up to 7 years.
The satellite also lacks its own ultra-precise hydrogen maser `clock', so the tracking stations pipe up the time and frequency signals needed for VLBI.
The equations of general relativity predicted precisely the measured slowing of time, to an accuracy of about one part in 100 million - 10,000 times more accurate than the measurements made 30 years ago using two hydrogen maser clocks, one on Earth and the other launched via rocket to a height of 10,000 kilometers.