W2MMD Clubhouse Weather Station

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:

Here's where the Python program is located:

How to wire the components without the Pi hat:

How to record the data:

Web code:

Software update:

Here are the initial devices found:

Here's the code for the constants:

#!/usr/bin/env python
# Weather Board Test File
# Version 1.8 August 22, 2016
# SwitchDoc Labs

# imports

import sys
import time
from datetime import datetime

W2MMD Satellite Station Copies Early Fox1Cliff Telemetry

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

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…