http://www.nortek.com.cn/en/knowledge-center/forum/current-profilers-and-current-meters Question or comments about Nortek current profilers or current meters daily 1 2007-11-12T12:20:37Z http://www.nortek.com.cn/en/knowledge-center/forum/current-profilers-and-current-meters/164942324/585100719/view Dear Samy, Yes, this is very possible. Exactly how is dependent of in which coordinate system your data is, and what format you want them to be. This is ... 2011-11-10T15:00:32Z Comment http://www.nortek.com.cn/en/knowledge-center/forum/current-profilers-and-current-meters/164942324/671909129/view The text doesn't appear... I have deployed two Aquadopps in the same place at different times but unfortunately the heading has changed. I want to have a ... 2011-11-10T13:49:57Z Comment http://www.nortek.com.cn/en/knowledge-center/forum/current-profilers-and-current-meters/164942324/671909128/view 2011-11-10T13:42:03Z Comment http://www.nortek.com.cn/en/knowledge-center/forum/current-profilers-and-current-meters/917632780/41095204/view Hi Jonas, This explains a lot and answers my question perfectly.  Thank you for the prompt response. Regards, Dan 2011-10-06T09:18:21Z Comment http://www.nortek.com.cn/en/knowledge-center/forum/current-profilers-and-current-meters/917632780/61116762/view Dear Dan, Your observations are right, there are no 'noise ping' in our modern instruments. What Storm does is to assume a noise floor as given below.  ... 2011-10-05T09:14:42Z Comment http://www.nortek.com.cn/en/knowledge-center/forum/current-profilers-and-current-meters/917632780/725662964/view Hi There, I'm afraid that after combing this forum and reading the manual I still do not understand the concept of a signal to noise ratio as it applies to ... 2011-10-04T12:01:36Z Comment http://www.nortek.com.cn/en/knowledge-center/forum/current-profilers-and-current-meters/65749976/192669535/view Dear Mr. Russello,   I also used the method with the amplitude peak to find the bottom and it worked quite well.   Thank you very much for your help 2011-10-03T14:43:05Z Comment http://www.nortek.com.cn/en/knowledge-center/forum/current-profilers-and-current-meters/253636748/91848991/view Dear Steve,   How much this offset will differ between different sediment types is uncertain, but it shouldn't be too much for small cells. If you check ... 2011-09-30T12:24:22Z Comment http://www.nortek.com.cn/en/knowledge-center/forum/current-profilers-and-current-meters/253636748/602513402/view Thanks Jonas! Doing an on-site calibration to determine offset is out of the question, but doing a calibration somewhere else would be easy.  There might be ... 2011-09-29T18:31:53Z Comment http://www.nortek.com.cn/en/knowledge-center/forum/current-profilers-and-current-meters/253636748/602513401/view Hi Steve, I think the offset you're experiencing is as expected. It would be more correct to use the start of the amplitude increase.  Since it is easier to ... 2011-09-29T09:12:00Z Comment http://www.nortek.com.cn/en/knowledge-center/forum/current-profilers-and-current-meters/253636748/522007969/view Hi there.  I'm trying to figure out how high a downlooking aquadopp was deployed above the bed.   The high backscatter from the bed was loud & clear.  I ... 2011-09-28T21:13:45Z Comment http://www.nortek.com.cn/en/knowledge-center/forum/current-profilers-and-current-meters/65749976/638901166/view Cell locations can be calculated using the blanking distance and cell size. What I have done in the past is look for an amplitude peak and assumed the bottom ... 2011-09-23T13:00:09Z Comment http://www.nortek.com.cn/en/knowledge-center/forum/current-profilers-and-current-meters/65749976/638901165/view Dear Mr. Russello, Thank you for your fast reply. I now increased my filter threshold for amplitude values which resulted in a much better profile(the ... 2011-09-23T08:52:26Z Comment http://www.nortek.com.cn/en/knowledge-center/forum/current-profilers-and-current-meters/65749976/930933087/view I think there is a bug in the header information. We had  another question recently on cell position and noticed there were two different values reported for ... 2011-09-21T13:16:05Z Comment http://www.nortek.com.cn/en/knowledge-center/forum/current-profilers-and-current-meters/65749976/930933086/view Hello , I am using a 2MHz Aquadopp HR current profiler downward looking mounted 50cm from the bottom of sandy/silty sediment in the mouth of an estuary. The ... 2011-09-21T08:21:54Z Comment http://www.nortek.com.cn/en/knowledge-center/forum/current-profilers-and-current-meters/336963684/623973954/view Ok we'll do that, Thank you both for all the information!   Mireia     2011-09-16T14:10:18Z Comment http://www.nortek.com.cn/en/knowledge-center/forum/current-profilers-and-current-meters/336963684/629015924/view Dear Mireia, The 3dB above noise floor (31 counts for your instrument) threshold is a rule of thumb. In some conditions this is conservative, others ... 2011-09-15T10:10:54Z Comment http://www.nortek.com.cn/en/knowledge-center/forum/current-profilers-and-current-meters/336963684/889459634/view Normal 0 21 false false false CA X-NONE X-NONE ... 2011-09-14T18:39:15Z Comment http://www.nortek.com.cn/en/knowledge-center/forum/current-profilers-and-current-meters/336963684/369760196/view Dear Mireia,   Sorry about the delay. I think your diagnose is a good one. This instrument has got a noise floor of 25 counts. A rule of ... 2011-09-02T13:08:28Z Comment http://www.nortek.com.cn/en/knowledge-center/forum/current-profilers-and-current-meters/77506259/524230656/view Dear Nuno,   I am sorry to say that these parameters are not available in the NMEA format. They are available in the binary serial output from the ... 2011-09-02T12:31:34Z Comment