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W2MMD Clubhouse Weather Station

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Here are notes for the weather station.  We'll write an article around it once we get it working.

A useful link focused on solar power but with lots of useful links: https://www.instructables.com/id/Create-Your-Own-Solar-Powered-Raspberry-Pi-Weather/

Here's where the Python program is located:


How to wire the components without the Pi hat: https://projects.raspberrypi.org/en/projects/build-your-own-weather-station/2

How to record the data: https://www.instructables.com/id/Complete-DIY-Raspberry-Pi-Weather-Station-with-Sof/

Web code: https://dzone.com/articles/how-to-build-your-own-weather-station-using-a-rasp

Software update: https://www.switchdoc.com/2017/03/groveweatherpi-new-softwarehardware-version-released/

Here are the initial devices found:

Here's the code for the constants:



COde:
#!/usr/bin/env python
#
# Weather Board Test File
# Version 1.8 August 22, 2016
#
# SwitchDoc Labs
# www.switchdoc.com
#
#

# imports

import sys
import time
from datetime import datetime
im…

W2MMD Satellite Station Copies Early Fox1Cliff Telemetry

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The Fox1Cliff satellite was launched last night (12/3) and is currently in "safe mode" for testing. Telemetry is critical for the AMSAT tech team during the early stages of a satellite's life, and we had a 66 degree elevation pass this morning so I logged into the clubhouse VPN, opened a VNC window to the Fox in a Box (FIAB) Pi and also an SDR Console window so I could view and hear the signal. (For info about FIAB see this article.) In Safe mode there are only short transmissions every few minutes, so it was hard to get a good telemetry reading. But the signal was very strong when it was being transmitted, so I was hopeful of getting a few telemetry frames from a short transmission. I opened a TCP connection to the clubhouse from my local copy of PST Rotator and set to aim the antennas at the next Fox1Cliff pass.

The pass started, but I heard nothing.  This was expected - there are only short transmissions spaced with silence. But quickly I saw this signal appear indica…

Receiving and Reporting Telemetry from Fox Satellites

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Updated 12/8/18
AMSAT has launched and maintained three "Fox"-type satellites that are easily available for ham use. They're in low-earth orbit and use standard 2 meter FM transmissions, and can occasionally be worked with an HT. A fourth satellite is scheduled to be launched on December 2 2018.

In addition to audio QSOs these satellites transmit telemetry information about various parameters related to the health of the satellites that are monitored by ground stations. This data is transmitted using a low audio frequency underneath the voice signals during a normal QSO using a "data under voice" (DUV) technology - so you can't hear it but it can be decoded. One of the telemetry screens for AO-85 looks like this:



Since the satellites orbit over all parts of the earth, it takes a network of stations to continually monitor the telemetry to give AMSAT a continuous stream of data. AMSAT distributes a free Fox telemetry program for Windows, Mac and Linux for use…