Change unit for typeID=SO2-flux-a

[rumachan]

Can the unit for typeID=SO2-flux-a be changed from t/d to kg/s (tonnes/day to kilograms/second).

Volcanic flux data already in FITS are daily averages with units of tonnes/day. Daily averages and tonnes/day as units are common international usage in volcanology.

But, we want FITS to contain the flux values calculated from individual instrument scans, as these are the basic data we collect. Those scans are currently every minute or every 4 minutes (depending on the instrument type). Not all scans produce data, so uploading individual scans does not imply a massive volume of data. For a scan that takes such as a short period of time, a unit of tonnes/day is not appropriate, and we want to use kg/s. This is better as it is a SI unit, and Agnes says it is becoming more commonly used in the community.

[gclitheroe]

Yes it can be changed. What should happen with the existing data that's in that unit? Should I

1. change then unit and you will update the data?
2. change the unit and delete the existing data?
3. something else...

[rumachan]

Thanks Geoff,

As we intend to store data per scan, rather than daily average data, if would be better to change the unit and then delete the existing data.

Thanks,

SS

Steven Sherburn GNS Science Wairakei New Zealand

-----Geoff Clitheroe notifications@github.com wrote: ----- To: GeoNet/fits fits@noreply.github.com From: Geoff Clitheroe notifications@github.com Date: 03/29/2016 01:56PM Cc: rumachan s.sherburn@gns.cri.nz Subject: Re: [GeoNet/fits] Change unit for typeID=SO2-flux-a (#67)

Yes it can be changed. What should happen with the existing data that's in that unit? Should I

change then unit and you will update the data? change the unit and delete the existing data? something else... — You are receiving this because you authored the thread. Reply to this email directly or view it on GitHub

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[gclitheroe]

Hi,

there are three gas flux measurements using tonnes per day. Would you like the unit changing and any data deleting for all of these or just SO2-flux-a?

   typeid   | symbol |      name      
------------+--------+----------------
 SO2-flux-a | t/d    | tonnes per day
 CO2-flux-a | t/d    | tonnes per day
 H2S-flux-a | t/d    | tonnes per day

[rumachan]

Hi Geoff,

Mmmm, this is getting messy. The reason for the requested change in units was specifically for land based scanners, but it also impacts measurements made when flying, we hadn't thought of this. If we change one we have to change all. Let me talk with Agnes and Nico and get back to you.

Thanks

[rumachan]

Hi Geoff, Have had a chat with Agnes and Nico. Please go ahead and change all gas flux measurements that are using to tonnes/day to kg/s and delete the data in the DB.

[gclitheroe]

Done.