Displaying 2 results from an estimated 2 matches for "70kw".
Did you mean:
70k
2017 May 24
2
System Time Source
On Wed, May 24, 2017 10:45 am, Warren Young wrote:
> On May 24, 2017, at 8:52 AM, Chris Adams <linux at cmadams.net> wrote:
>>
>> Once upon a time, Warren Young <warren at etr-usa.com> said:
>>> a. It???s transmitting from a fixed location in a time zone you
>>> probably aren???t in ??? US Mountain ??? being the least populous of
>>> the lower
2017 May 25
0
System Time Source
.... Angular transmission pattern of satellite (horn?
> or is it yagi? antenna) vs ground based (monopole? or dipole? antenna -
> which one is used there to transmit in HF?).
WWVB uses a two-element phased array, where each element is a 400-ft
top-loaded vertical monopole. The ERP is listed as 70kW, so the antenna
gain is already applied to the transmitted signal's specification and
thus doesn't need to be considered. (Lots of technical data can be found
in NIST's report on the 1998 upgrade:
http://ws680.nist.gov/publication/get_pdf.cfm?pub_id=50031 ).
Please see http://gpsin...