Hi! I was curious if the Arbimon time stamp has a precision, and if it does, if the drift on the time stamp has been characterized? And have Open Acoustic Devices thought about adding a GPS receiver to get very precise timings?
I am thinking about physical environmental signals more than biological signals, but the timing might open up new opportunities for sensor networks :)
Thanks! -- Alex
This looks like it is right at the price range we want. How does GroupGets work? I am seeing a couple of funded campaigns:
so, do I work on contributing to these, or do I wait for a new campaign to come out? Thanks for the help!
Hi Alex, The AudioMoth real-time clock will typically drift up to about 1 second per day. Both, uMoth and HydroMoth use a slightly more accurate oscillator and will be about 0.25 seconds per day. The standard AudioMoth firmware supports the use of a GPS module to reset the time before each recording period. This typically allows recordings to be synchronised to within a 1 ms. See the application note here: https://github.com/OpenAcousticDevices/Application-Notes/blob/master/Using_the_AudioMoth_GPS_Board/Using_the_AudioMoth_GPS_Board.pdf There will be a group purchase for GPS boards in a month or so, and a new housing is in manufacture that will make using the GPS board and a large battery pack even easier. When very high precision is required, there is an additional firmware option - https://www.openacousticdevices.info/gps-sync - which runs the GPS during the recording. This allows the recordings to be synchronised to better than 1 us and is intended for applications that are doing sound source localisation from multiple recorders. Alex