[time-nuts] DSAC launches tonight
Poul-Henning Kamp
phk at phk.freebsd.dk
Tue Jun 25 06:33:23 UTC 2019
--------
In message <89d7213a-30a8-de38-a150-fc22ec733d14 at earthlink.net>, jimlux writes:
>and, as well, COSMIC-2 is being deployed - 6 satellites each carrying a
>fancy GPS receiver that does two things: Precision Orbit Determination
>(POD) using a choke ring antenna; Occultation measurements of the
>atmosphere using a directive array of helical antennas facing the limb.
How do you orient a choke ring antenna in space ? Is the distance
for LEO to GNSS orbits long enough that you can still just "point
it upwards" ?
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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