Barometric Altimeter

Barometric Altimeter


The altitude is computed from the local barometric pressure using the 1976 standard earth atmosphere formula. This formula, apparently works best at about 45 deg latitude, so if you are near the equator, like I am, then the default average elevation will be slightly offset from reality.

The observed value altitude can be calibrated, when the elevation at a location is already known. The approximate ground level elevation of where you are can be got from Google Maps.

Since the barometric pressure varies with the weather, this application may not give accurate results over a long period of time (say several hours), but the relative altitude/elevation is quite accurate for periods of ten's of minutes to less than an hour.

The rate of change of altitude is computed, which is useful to see how fast an elevator goes, or perhaps for skydivers, paragliders or birds.

Important note on Data Recording: Since the Android O/S is not meant to support an App running continuously as a background process, the only reliable way to continuously record data with this app, is to ensure that it is always a foreground process.

Keywords: Barometer Altimeter Altitude Elevation Pressure

Recent changes:
Please goto https://sites.google.com/site/msanders59/barometric-altimeter for user hints.

New features:

1. Added option to record data to the SD card.
2. Show the elevation and pressure values on the Plot Screen.
3. general UI enhancements and bug fixes.
4. Need two extra permissions for the new features. These are to write to external-storage-device, and wake-lock.
Add to list
Free
81
4.1
User ratings
66
Installs
10,000+
Concerns
0
File size
0 kb
Screenshots
Screenshot of Barometric Altimeter Screenshot of Barometric Altimeter Screenshot of Barometric Altimeter
About Barometric Altimeter
The altitude is computed from the local barometric pressure using the 1976 standard earth atmosphere formula. This formula, apparently works best at about 45 deg latitude, so if you are near the equator, like I am, then the default average elevation will be slightly offset from reality.

The observed value altitude can be calibrated, when the elevation at a location is already known. The approximate ground level elevation of where you are can be got from Google Maps.

Since the barometric pressure varies with the weather, this application may not give accurate results over a long period of time (say several hours), but the relative altitude/elevation is quite accurate for periods of ten's of minutes to less than an hour.

The rate of change of altitude is computed, which is useful to see how fast an elevator goes, or perhaps for skydivers, paragliders or birds.

Important note on Data Recording: Since the Android O/S is not meant to support an App running continuously as a background process, the only reliable way to continuously record data with this app, is to ensure that it is always a foreground process.

Keywords: Barometer Altimeter Altitude Elevation Pressure

Recent changes:
Please goto https://sites.google.com/site/msanders59/barometric-altimeter for user hints.

New features:

1. Added option to record data to the SD card.
2. Show the elevation and pressure values on the Plot Screen.
3. general UI enhancements and bug fixes.
4. Need two extra permissions for the new features. These are to write to external-storage-device, and wake-lock.

Android Market Comments
A Google User
May 25, 2015
Csv file not created App works and show reasonable results on screen. When trying to save the csv datafile, however, it fails. I think the problem is the different mount points of the SD card in different phones. The should be an option allowing the use to change the file location.
A Google User
Nov 15, 2014
Best high speed logging app! Fantastic sub-second graphing interval capability. Requesting an extra digit of resolution in barometric pressure display.
A Google User
Oct 12, 2014
Simple and reliable I love the minimal setup and hassle!
A Google User
Jul 25, 2014
Altimeter This altimeter has a little error compare to other application of altimeter.
A Google User
Jun 2, 2014
Good enough
Version 1000000
Version 1000000