Dear W. Halstead,
Two months ago you asked questions on this email list about the
planetary ephemeris used by program WSJT-X for astronomical
calculations. I set your query aside to be answered later -- and
somehow "later" has not arrived until now. Sorry for the delay.
Some details about
William,
Change? No.
Be more accurately measured? Yes.
But enough to change EME calculations in WSJT-X? No idea, that is why
I asked the question.
"Compared to the previous general-purpose ephemerides DE430, seven
years of new data have been added to compute DE440 and
Il 18/08/21 07:21, Luigi Casari via wsjt-devel ha scritto:
Non mi interessa, stop !
Il giorno 18 ago 2021, alle ore 09:27, halsteaw--- via wsjt-devel
ha scritto:
(Not an astronomer)
I noticed in the contrib/Ephemeris folder that the JPLEPH file is
DE405 which was created back in 1997.
I can't easily determine how the accuracy of the two files differs, but does
the moon change it's orbital parameters that much in 23 years?
73, Willie N1JBJ
> On Aug 18, 2021, at 3:27 AM, halsteaw--- via wsjt-devel
> wrote:
>
> (Not an astronomer)
>
> I noticed in the contrib/Ephemeris
Luigi,
I'm sorry you are not interested, but it is a valid question about the
WSJT-X code.
Warren
On Wed, Aug 18, 2021, 3:41 AM Luigi Casari via wsjt-devel <
wsjt-devel@lists.sourceforge.net> wrote:
> Non mi interessa, stop !
>
> > Il giorno 18 ago 2021, alle ore 09:27, halsteaw--- via
Non mi interessa, stop !
> Il giorno 18 ago 2021, alle ore 09:27, halsteaw--- via wsjt-devel
> ha scritto:
>
> (Not an astronomer)
>
> I noticed in the contrib/Ephemeris folder that the JPLEPH file is
> DE405 which was created back in 1997.
> (Ref: https://ssd.jpl.nasa.gov/?planet_eph_export
(Not an astronomer)
I noticed in the contrib/Ephemeris folder that the JPLEPH file is
DE405 which was created back in 1997.
(Ref: https://ssd.jpl.nasa.gov/?planet_eph_export )
Is there a reason that such old data is being used?
For the best EME and other calculations, shouldn't DE440 which was
