Peter,Thats true, I was letting you know that the problem of the hydrophones flooding is being resolved or is at least being addressed. The main concern I have now is how wide a cone of detection each hydrophone has. A cone too narrow could allow surface contacts to hide between these zones of detections and be close aboard with little or no warning. Should this prove to be the case, a new revised array may contain additional hydrophones to remove these blind spots...only the actual testing will reveal this. The primary goal thus far was to produce a passive sonar array that is as simple as possible that would allow for 360 degrees of trainability. Increasing the bearing accuracy and other indications such as noise to background levels, recording detected sounds, and so on are projects for future upgrades. I want to get "up and running" however simple. Have you conducted any further sound studies with your purchased hydrophone? It would seem that the dolphin ear was primarily for use as a dipping hydrophone after all...we will somehow modify it for our purposes.
David Bartsch
From: "Peter Madsen" <peter@submarines.dk> Reply-To: personal_submersibles@psubs.org To: <personal_submersibles@psubs.org> Subject: Re: [PSUBS-MAILIST] Passive sonar Date: Mon, 17 Sep 2007 16:13:18 +0200That´s a technicality - question is if you are capeble of telling in what direction a surface contact is, and with what accuracy...Regards, Peter----- Original Message ----- From: "David Bartsch" <dbartsch2236@hotmail.com>To: <personal_submersibles@psubs.org> Sent: Monday, September 17, 2007 2:15 PM Subject: Re: [PSUBS-MAILIST] Passive sonarPeter,Stephen Pearce is working on an upgrade to the hydrophones...It is only good now to 40 FSW! He tested it in a pressure tank and it started flooding at 18psi. Good to know thow.David BartschFrom: "Peter Madsen" <peter@submarines.dk> Reply-To: personal_submersibles@psubs.org To: <personal_submersibles@psubs.org> Subject: Re: [PSUBS-MAILIST] Passive sonar Date: Mon, 17 Sep 2007 09:35:51 +0200 Hi, I really hope for your sucses ! Peter Madsen / UC-3 Nautilus----- Original Message ----- From: "David Bartsch" <dbartsch2236@hotmail.com>To: <personal_submersibles@psubs.org> Sent: Monday, September 17, 2007 5:57 AM Subject: [PSUBS-MAILIST] Passive sonarPSUBS,The passive sonar I have been working on for so long is completed! The omni dirrectional mode was ommitted as problems existed with this mode on initiall installation. Testing aboard a small pleasure craft will be conducted during the Spring of 2008. Although trainable search mode is operational, I must determine the exact cone of geographical coverage of each hydrophone so as to avoid "gaps" of contact detections between hydrophones. In shop testing proved very good with the selected hydrophones "active" once selected. The premp/amp console has "extra" jack inputs for cavitation and other own ship noise monitoring purposes.We are on our way! David Bartsch _________________________________________________________________Gear up for Halo® 3 with free downloads and an exclusive offer. http://gethalo3gear.com?ocid=SeptemberWLHalo3_MSNHMTxt_1************************************************************************ ************************************************************************ ************************************************************************ The personal submersibles mailing list complies with the US Federal CAN-SPAM Act of 2003. Your email address appears in our database because either you, or someone you know, requested you receive messages from our organization. If you want to be removed from this mailing list simply click on the link below or send a blank email message to: removeme-personal_submersibles@psubs.org Removal of your email address from this mailing list occurs by an automated process and should be complete within five minutes of our server receiving your request. PSUBS.ORG PO Box 53 Weare, NH 03281 603-529-1100 ************************************************************************ ************************************************************************ ************************************************************************-- Jeg beskyttes af den gratis SPAMfighter til privatbrugere. Den har indtil videre sparet mig for at få 23004 spam-mails. Betalende brugere får ikke denne besked i deres e-mails. Hent gratis SPAMfighter her: http://www.spamfighter.com/lda ************************************************************************ ************************************************************************ ************************************************************************ The personal submersibles mailing list complies with the US Federal CAN-SPAM Act of 2003. Your email address appears in our database because either you, or someone you know, requested you receive messages from our organization. If you want to be removed from this mailing list simply click on the link below or send a blank email message to: removeme-personal_submersibles@psubs.org Removal of your email address from this mailing list occurs by an automated process and should be complete within five minutes of our server receiving your request. PSUBS.ORG PO Box 53 Weare, NH 03281 603-529-1100 ************************************************************************ ************************************************************************ ************************************************************************_________________________________________________________________Get the device you want, with the Hotmail® you love. http://www.microsoft.com/windowsmobile/mobilehotmail/default.mspx?WT.mc_ID=MobileHMTagline************************************************************************ ************************************************************************ ************************************************************************ The personal submersibles mailing list complies with the US Federal CAN-SPAM Act of 2003. Your email address appears in our database because either you, or someone you know, requested you receive messages from our organization. If you want to be removed from this mailing list simply click on the link below or send a blank email message to: removeme-personal_submersibles@psubs.org Removal of your email address from this mailing list occurs by an automated process and should be complete within five minutes of our server receiving your request. PSUBS.ORG PO Box 53 Weare, NH 03281 603-529-1100 ************************************************************************ ************************************************************************ ************************************************************************-- Jeg beskyttes af den gratis SPAMfighter til privatbrugere. Den har indtil videre sparet mig for at få 23008 spam-mails. Betalende brugere får ikke denne besked i deres e-mails. Hent gratis SPAMfighter her: http://www.spamfighter.com/lda ************************************************************************ ************************************************************************ ************************************************************************ The personal submersibles mailing list complies with the US Federal CAN-SPAM Act of 2003. Your email address appears in our database because either you, or someone you know, requested you receive messages from our organization. If you want to be removed from this mailing list simply click on the link below or send a blank email message to: removeme-personal_submersibles@psubs.org Removal of your email address from this mailing list occurs by an automated process and should be complete within five minutes of our server receiving your request. PSUBS.ORG PO Box 53 Weare, NH 03281 603-529-1100 ************************************************************************ ************************************************************************ ************************************************************************
_________________________________________________________________Kick back and relax with hot games and cool activities at the Messenger Café. http://www.cafemessenger.com?ocid=TXT_TAGHM_SeptHMtagline1
************************************************************************ ************************************************************************ ************************************************************************ The personal submersibles mailing list complies with the US Federal CAN-SPAM Act of 2003. Your email address appears in our database because either you, or someone you know, requested you receive messages from our organization. If you want to be removed from this mailing list simply click on the link below or send a blank email message to: removeme-personal_submersibles@psubs.org Removal of your email address from this mailing list occurs by an automated process and should be complete within five minutes of our server receiving your request. PSUBS.ORG PO Box 53 Weare, NH 03281 603-529-1100 ************************************************************************ ************************************************************************ ************************************************************************