When you download data from your Signature, you may find that you have two .ad2cp files:

• [filename].ad2cp
• [filename]_avgd.ad2cp

Because Signatures have a high sampling rate and the ability to store raw data, the stored files can grow large and be a challenge to process. All your data is stored in [filename].ad2cp regardless of data type. To allow the user to quickly investigate the results without having to download the full raw data file ([filename].ad2cp), an additional data file is stored containing only the averaged current data ([filename]_avgd.ad2cp). Only data where the correlation is above 50% will be included in the averaging, and the data will also include a percent-good* value. Any bad data will be removed, or flagged with extreme values (e.g. -32.77 m/s). This averaging is only applicable to average mode; burst data will not be processed in this manner.

In order to process the data in Ocean Contour, or to send data to Support for analysis, you MUST download the raw data, [filename].ad2cp. The averaged file cannot be processed, and is not useful for in-depth analysis of any problems.

*"Percent Good" is defined as the percentage of data points above 50% correlation that go into an average ensemble.