[Fwd: [Subsurface-trac] #486: Manually entered profile not transferred correctly to divelogs.de]

[Jef Driesen]

On 2014-04-07 14:32, Rainer Mohr wrote:
> Am 07.04.14 13:06, schrieb Jef Driesen:
>> For the Oceanics the situation is a bit different. It's a real event 
>> based mechanism, without a base sample rate (like the 4s used by the 
>> Uwatecs), at least not that I know about. To make things worse, is 
>> that the resolution of the recorded timestamp is only 1 minute. The 
>> result is that you can end up with zero or more values per minute. 
>> Currently libdivecomputer tries to spread those evenly within that 
>> minute. Far from perfect, but it does result in something reasonable. 
>> Multiple values with the same timestamps is probably even more 
>> confusing for applications. But the consequence is that the sample 
>> interval is variable.
> 
> Ugh, that sucks...
> I do have an Oceanic Import for the Oceanlog Software, its an Access
> file and it actually does look like I get multiple values for the same
> bottom time in some occasions... Oh dear...
> One example file I have gives me a depth value every 15 secs with some
> having multiple values. Another example file gives me continuous 1
> second steps apparently with no multiple values.

I don't remember all the details from memory, but I believe all Oceanic 
devices from the vtpro family record timestamps in each sample, 
regardless of the time or depth based sampling. That timestamp has only 
a resolution of one minute. For a time based sampling, that's not a 
major problem because you can use the sample interval to figure out the 
exact timestamp. But for the depth based sampling, there is no sample 
rate, and you can't do this.

> To make things even worse, Oceanic started encrypting their mdb Access
> files starting with version 2.2.8 of the Oceanlog Software. You
> somethimes wonder what goes on in peoples heads... Guess they really
> needed to hide my own data from myself.

I never noticed. But I usually don't need to look into the database 
files.

>> I can provide some data if you want to have a look.
>> 
> I have two example Oceanlog files, but if you have anything else, that
> would be helpful, thanks.

I have two memory dumps containing dives with a depth based sample rate. 
Do I send you the raw memory dumps, or do you prefer to have the data 
downloaded into oceanlog instead?

Jef