Help! what is the highest sampling frequency of Warrior?

[peter.zhang]

Dear all,
Who can help me to explain what the highest sampling frequency could be in warrior? How can get it?
Many Thanks.
Peter

[adamg]

Peter,

  there are actual limits but it would not necessarily make sense to try and store sampled data at those limits if it wasn't necessary, what you would end up with is huge databases containing massive amounts of repeated data (raw and processed).

  What really determines the limitation of sample rate are two things (generalized). The first is how fast can the raw sensor data get in to the system, taking the case of a telemetry tool that may for example send 20 new frames of data per second. Secondly, what actual logging speed are you targeting for this tool, lets say for an example 15 ft/min. To maximize sampling with these two parameters you could calculate that you could at best efficiency sample a new sample of data every 0.15 inches, 80 samples per foot. (15 ft/min = 3 inches/second, 20 samples in 3 inches is a new sample at 0.15 inches, which is 80 samples per foot).

  Conversely, knowing the precision you'd like, say maybe 0.1 inch samples, you can determine the ideal logging speed to not under/over sample. In this case 10 ft/min. (0.1 * 20 = 2 inches per second, = 10 ft/min.

  Configuring for this in Warrior is in the Service setup. You would need to set the devices to record at the rate require to have new depth samples and sensor sample for the desired sampling rate, for example:

Device1= Base, 80
Device2= DSP, 80, script=".was"
Device3= SDSTIP, 1
Device4= Aux, 80

Then your sensors, when not given a specific sample rate will follow the rate from where the sensor originates, eg

CCL = Base     would give you a CCL at 80 samples/foot

But you can produce sensors that sample more coarsely than the rate of the device, eg

GR = DSP,GR,4  would give you GR at 4 samples/foot

Hope this helps.

Adam

[peter.zhang]

Adam?
Thank you very much for your reply. it is quite clear for me now!