Re: [time-nuts] New tide gauge uses GPS signals to measure sea level change

Which begs the question: just where the heck, exactly, is the center of the Earth given that it is in the 'middle' of a molten and dynamic core. Are the satellite orbits so stable and/or measurable around the center of gravitational pull that the location can be determined from that? Where is the

Re: [time-nuts] New tide gauge uses GPS signals to measure sea level change

On 5/28/14, 6:04 AM, Tom Holmes wrote: Which begs the question: just where the heck, exactly, is the center of the Earth given that it is in the 'middle' of a molten and dynamic core. Are the satellite orbits so stable and/or measurable around the center of gravitational pull that the location

Re: [time-nuts] New tide gauge uses GPS signals to measure sea level change

On 5/27/14, 9:21 PM, Chris Albertson wrote: On 5/27/14, 10:24 AM, Brooke Clarke wrote: BACK ON TOPIC... What does it take to measure ones distance from the center of the Earth accurately enough to detect geological movement in a reasonable amount of time? Measuring distance really is,

Re: [time-nuts] New tide gauge uses GPS signals to measure sea level change

Thanks Jim. So if, just for fun since this is time-nuts after all, I wanted to make a similar measurement in my back yard here in the relatively stable Ohio, would I be able rig something up to monitor the position changes? Obviously a lot of averaging of GPS position data would be needed but

Re: [time-nuts] New tide gauge uses GPS signals to measure sea level change

thol...@woh.rr.com said: I'm not sure my Z3801 or any of my navigation receivers have the necessary resolution to see even 10 mm. In normal operation (post survey), a Z3801A knows the location and uses that to work out a better time and/or the time with fewer satellites. So you won't be

Re: [time-nuts] New tide gauge uses GPS signals to measure sea level change

Hal, you bring up an interesting point:  Is the receiver in a Z3801 inherently more accurate in position reporting than the receiver in an Adafruit?  Somehow I doubt it, if for no other reason than the improvements in technology.  (Excluding any programming errors that may or may not exist in

Re: [time-nuts] New tide gauge uses GPS signals to measure sea level change

I'll have to run a quick calculation on the data it presents to see if it is good enough to use. Tom Holmes, N8ZM -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Hal Murray Sent: Wednesday, May 28, 2014 5:33 PM To: Discussion of

Re: [time-nuts] New tide gauge uses GPS signals to measure sea level change

On 5/28/14, 2:11 PM, Tom Holmes wrote: Thanks Jim. So if, just for fun since this is time-nuts after all, I wanted to make a similar measurement in my back yard here in the relatively stable Ohio, would I be able rig something up to monitor the position changes? Obviously a lot of averaging of

Re: [time-nuts] HP 58503A service manual with schematics

hi John I am new in the list but not in the art here a lot of manuals http://exodus.poly.edu/~kurt/manuals/manuals/HP%20Agilent/ Gianni In 28 maggio 2014, starb...@uplink.net scritto: Hello to the time experts, I own a nice HP-58503A and I would be happy to find a pdf version of the complete

Re: [time-nuts] New tide gauge uses GPS signals to measure sea level change

On Wed, May 28, 2014 at 6:28 PM, Jim Lux jim...@earthlink.net wrote: What you need is to program your receiver to give you the raw observables (someone on the list can point you to how you do this), and then you need to get them in what's called RINEX file format. You submit your RINEX

[time-nuts] ESE ES-180 WWV Receiver Schematic

Hi All: This posting is not about splitting milli-seconds or other accuracy stuff, but I need help and thought of our time-nuts group. At our Ham club we try to keep accurate time (think wall clock) for logging certain tests, local and state emergency skeds and coordination with other EmComm