Re: [Discuss-gnuradio] Lunar imaging experiment

[Juha Vierinen]

We're transmitting two linear polarizations interleaved. Any polarization should work. 

Two independent linear polarizations will give optimal results when producing a map (one can form polarized and depolarized images).

Here's a link to the radar:

http://jro.igp.gob.pe/english/

juha

On Mon, Jul 3, 2017 at 10:26 PM, Michael Ossmann <address@hidden> wrote:

Cool!  Is there an optimal receive antenna polarization?

Michael

On Mon, Jul 03, 2017 at 10:07:03PM +0000, Juha Vierinen wrote:
>
> Hi,
>
> I forgot to mention that the interpulse period is 38 ms on  2017/07/04 at
> 01:21:00 UTC and 40 ms on 2017/07/05 02:04:00 UTC.
>
> juha
>
>
> On Mon, Jul 3, 2017 at 9:58 PM, Juha Vierinen <address@hidden> wrote:
>
> > Hi,
> >
> > Just to let you guys know, I'll be radiating the moon with 1 MW and 36 dBi
> > 49.92 MHz on 2017/07/04 at 01:21:00 UTC. The experiment will repeat also at
> >  2017/07/05 02:04:00 UTC. Both experiments last about 15 minutes, when the
> > Moon transits the radar beam.
> >
> > In case somebody wants to tune in with their gear, here are some details.
> >
> > I'm using the Jicamarca radio observatory radar, which is located in Peru.
> > The system is locked to GPS. The transmissions are binary phase coded
> > pulses with 10 microsecond baud length, so a recording with >100 kHz
> > bandwidth is needed.
> >
> > If you've got a GPS locked system, you should be able to produce a lunar
> > synthetic aperture radar map, such as this one:
> >
> >  http://www.haystack.mit.edu/~j/ns-depolarized.png
> >
> > The phase code is a 13*13 bit Kroenecker product Barker code. The phases
> > are listed here:
> > http://www.haystack.mit.edu/~j/b169.h5
> >
> > In text form, the code is:
> > [ 1.  1.  1.  1.  1. -1. -1.  1.  1. -1.  1. -1.  1.  1.  1.  1.  1.  1.
> >  -1. -1.  1.  1. -1.  1. -1.  1.  1.  1.  1.  1.  1. -1. -1.  1.  1. -1.
> >   1. -1.  1.  1.  1.  1.  1.  1. -1. -1.  1.  1. -1.  1. -1.  1.  1.  1.
> >   1.  1.  1. -1. -1.  1.  1. -1.  1. -1.  1. -1. -1. -1. -1. -1.  1.  1.
> >  -1. -1.  1. -1.  1. -1. -1. -1. -1. -1. -1.  1.  1. -1. -1.  1. -1.  1.
> >  -1.  1.  1.  1.  1.  1. -1. -1.  1.  1. -1.  1. -1.  1.  1.  1.  1.  1.
> >   1. -1. -1.  1.  1. -1.  1. -1.  1. -1. -1. -1. -1. -1.  1.  1. -1. -1.
> >   1. -1.  1. -1.  1.  1.  1.  1.  1. -1. -1.  1.  1. -1.  1. -1.  1. -1.
> >  -1. -1. -1. -1.  1.  1. -1. -1.  1. -1.  1. -1.  1.  1.  1.  1.  1. -1.
> >  -1.  1.  1. -1.  1. -1.  1.]
> >
> > Any reports of hearing the transmissions are appreciated.
> >
> > juha
> >

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