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Humidity, Temperature vs Pressure

SOhio 2017-1 Stratospheric Sense HAT data (pt 1) Pressure, Humidity, and Temperature

Introduction On the morning of August 12, 2017 I and my co-conspirators flew a High Altitude Balloon mission out of the Wyandot County Airport, near Upper Sandusky, Ohio.  One of the goals of this mission was to show we could operate a Raspberry Pi throughout the flight.  I had hoped to fly an SHT31A Humidity … Continue reading SOhio 2017-1 Stratospheric Sense HAT data (pt 1) Pressure, Humidity, and Temperature

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Highest Altitude picture

SOhio 2017-1 Downward Camera

The SOhio 2017-1 mission included a downward facing camera.  This was a Canon A495, running a CHDK intervalometer program.  Pictures were taken at roughly 20 second intervals.  About 380 in-flight pictures were taken. Additional information on the flight is contained in a previous post, Picam in the Sky. However, some relevant flight information is: Launch … Continue reading SOhio 2017-1 Downward Camera

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Picam in the Sky – SOHIO 2017-1

Last Saturday, Aug 12, 2017, we flew a Raspberry Pi carried by a 800gr weather balloon.  The payload reached 105.5 kft, and more importantly, was recovered.  This is a preliminary report to show the results of the attached  PiCam camera.  The Pi ran throughout the entire flight, as shown by the file creation times.  The … Continue reading Picam in the Sky – SOHIO 2017-1

Planned High Altitude Balloon Flight, August 5, 2017 – Postponed to Aug 12

  Update 8/12/2017:  Flight complete and retrieved. Report to follow. Flight path (enlarge the screen for full path) Update 8/9/2017: I'm planning to launch from Wyandot County Airport (56D), on Aug 12, at 9:45AM EDT. The APRS call sign has been corrected to KB8PVR-3. Present predictions are for a 60 mile flight toward the west, … Continue reading Planned High Altitude Balloon Flight, August 5, 2017 – Postponed to Aug 12

A Raspberry Pi WiFi Access Point for HiBal Missions

A Raspberry Pi WiFi Access Point for HiBal Missions Abstract: During Pre-flight checkout, and post-flight data dumps, I’d like a balloon payload flight computer to function as a stand alone wireless access point. I show how to setup a Raspberry Pi as a stand alone wireless access point, and include shell scrips to switch between … Continue reading A Raspberry Pi WiFi Access Point for HiBal Missions

High Altitude Balloon Humidity Measurement Methods

Abstract This is a survey of humidity measurement methods and some of the solid state devices available to perform humidity measurements. I am looking for methods suitable for making stratospheric balloon sounding dew point measurements. I intend to try this using an SHT-31A breakout board from ClosedCube. This sensor should be able to see the … Continue reading High Altitude Balloon Humidity Measurement Methods

Starting Sensors on the Raspberry Pi

One concern about using a Raspberry Pi for high altitude balloon projects, is the ability to reboot the computer and restart data collection.  I've had power interrupted during flight missions, sometimes due to loose wires but often due to batteries dropping in voltage due to the cold.  Things can restart at higher altitudes as payloads … Continue reading Starting Sensors on the Raspberry Pi

QST article on Bill Brown

The May QST has an article on: "Bill Brown, WB8ELK, Master of High-Altitude Balloon Projects " Bill has an Ohio connection. He began launching his balloon projects from Findlay, OH. From almost 10 yrs ago. 20th anniversary ARHAB speech https://youtu.be/Z2CGKD7kBdU 20th Anniversary Superlaunch https://youtu.be/oEQNjpzJCro     Another view of the launch https://youtu.be/gmxFcEYz7vg   Sorry  about … Continue reading QST article on Bill Brown