ARLA/CLUSTER: Fwd: [Amateur-DSN] CT4BB & CT1XV DSN works

[M. Esteves]

Parabéns Eng. Miranda e colega.
Sempre na vanguarda!
Abraço
Esteves\CT1ADT

Miguel Pelicano <miguel.pelicano  gmail.com> escreveu no dia quarta,
23/09/2020 Ã (s) 06:36:

>
> ---------- Forwarded message ---------
> De: Carlos <ct4bb  ct4bb.com>
> Date: terça, 22/09/2020, 20:49
> Subject: [Amateur-DSN] CT4BB & CT1XV DSN works
> To: <Amateur-DSN  groups.io>
> Cc: Georges AMARANTE <georges.amarante  wanadoo.fr>
>
>
> Hi colleagues.
>
> we don't know if there is interest on this, but here goes some information
> about what we, (CT4BB & CT1XV) are doing as newbies in DSN…
>
>
>
> Yesterday at 1:41 am local time, until 2:00 am, the NASA (MRO) MARS
> RECONNAISSANCE ORBITER probe was received here at the CT4BB QTH dining room
> window.
>
> MRO, having a strong signal of -105 dBm, I decided to try to receive it
> only with the Feed that was tested in the far field with the RF generator
> around 100 meters away which given a sensitivity of -130 dBm @ the feed
> mouth… ?
>
> So, the IMU feed needs to be actually tested with space signals because it
> had only been tested in the field.
>
> By 02:00 Local time I stopped receiving, MRO because it went beyond the
> window…
>
> The frequency of the MRO probe at that time was: 8,437,484 GHz
>
>
>
> A Tracker ( TRACKUINO ) was used, with a  miniRotor made in 3D PLA
> printing. This miniRotor is only for testing the TRACKUINO but supports
> loads up to 1 Kg
>
> The local oscillator is an ADF5355 at 8GHz and the MixerIR5 from Maki
> Microwave that gives an IF at 400MHz (420-460MHz).
>
> Notes:
>
>    1. Although a tracker was used, the feed has enough openness to point
>    the eye at Mars and receive the probe. I swept 20 ° to the left and to the
>    right and continued receiving the MRO.
>    2. TRACKUINO is a space object tracker using Arduino Due. It reads an
>    SD card with Ephemeris from the NASA Horizons site. Comparing real time
>    clock with Ephemeris time it sends commands to the rotors when hours are
>    equal.
>    3. For testing the TRACKUINO I designed in FUSION 360 a MiniRotor for
>    3D printing in PLA. This miniRotor have two  DC motors for Azimuth and
>    Elevation with switches and potentiometers to send position information to
>    the ARDUINO.
>
>
>
> We are new in DSN and have 7 phases in our DSN project . This is the 2th
> test phase.
>
> See you later
>
> CT4BB and CT1XV
>
>
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