05/24/2013,11:17:28,briankennedy,There will be no ROV ops today due to weather. 05/24/2013,13:40:32,elizabethlobecker,Subbottom data ops have commenced. 05/24/2013,14:23:31,carolruppel,think i am on now Meme 05/24/2013,14:27:29,carolruppel,have lost stream 1 right now; you had a good acquisition params prior to going up over that hummock, which might have been one of the carbonate-capped seeps the ROV saw yesterday; looked like gas below? out of plane bathymetry creating those 'shadows' ; if that is what i think--not much you can do to get better penetration or strat beneath the feature 05/24/2013,14:36:22,carolruppel,Meme--per Jason's email..what you got over the seeps was wonderful; looks like shortening pulse as you come down this side didn't help much; you can play around with the power too (take it down to 1 just to see what happens) if you want...some of this might just be gassy and thus hard to get good reflectivity, but there are hints of subbottom struct in some places -- like what you are coming up right now 05/24/2013,14:38:15,elizabethlobecker,Roger - power to 1 05/24/2013,14:39:12,carolruppel,yeah that doesn't look great...sorry 05/24/2013,14:39:28,elizabethlobecker,it's ok we're in a turn 05/24/2013,14:39:57,carolruppel,ok wait til you get out and keep it on 1 for a little while maybe and see how it does...sorry didn't realize in turn only have 2 computers here 05/24/2013,14:50:16,carolruppel,Meme--This is doing well on power 1 for now. Since you are just in transit, if you are 'hanging out' fine time to play around with pulse length to see what it does. Jason emailed me that AGC seems to have made it worse, but manually dealing with gains could be a real pain. 05/24/2013,14:50:38,carolruppel,You are recording everything right? 05/24/2013,14:53:16,Catalina Martinez,Hello Carolyn. Great to see you engaged with our operations! 05/24/2013,14:57:09,elizabethlobecker,all settings changes going in the log 05/24/2013,14:57:28,carolruppel,Hi Cat! Yes, this is the seep where we are working to write up the geology with Adam and others, so we are glad to see great data acquired... 05/24/2013,14:57:41,carolruppel,Meme--you might want to try power 2 again....sorry 05/24/2013,14:58:16,Catalina Martinez,Fabulous! And how exciting to be able to be so engaged from shore. 05/24/2013,14:58:18,elizabethlobecker,power 2 set a couple mins ago 05/24/2013,14:58:57,carolruppel,sorry laura brothers is on the phone with me..juggling too many media!! thank you 05/24/2013,15:00:27,elizabethlobecker,I don't know how to judge setting the gain. Have any tips, or I'll just leave in auto? 05/24/2013,15:06:02,carolruppel,WOW great data!!!!! 05/24/2013,15:06:22,elizabethlobecker,right?! 05/24/2013,15:06:55,elizabethlobecker,speed, pulse length, power, tx blanking. those are the settings that changed. 05/24/2013,15:11:09,elizabethlobecker,also the multibeam is not pinging, which may have been limiting the sbp ping rate before 05/24/2013,15:17:05,elizabethlobecker,about to cross seeps 05/24/2013,15:17:17,carolruppel,jason is going to drop off email; he suggested some things to try at end of lines/during turns etc just to give you better feel for how changing acq param X affects the data...i tend not to fiddle once things are working, but his point is valid for sure; do you tend to get what we call a spike on your 3.5 when the MB is running? 05/24/2013,15:18:17,elizabethlobecker,all sonars are synced, but the MB is lead, and sbp and ek60 wait to ping based on MB. 05/24/2013,15:18:56,carolruppel,ok 05/24/2013,15:45:51,carolruppel,This is a great system when it is working so well! I haven't used the 3260 before, but have heard good things from Langseth about it. 05/24/2013,16:18:02,carolruppel,Meme--my guess is you are running into and with following seas by doing the lines on this orientation, yes? 05/24/2013,16:20:51,elizabethlobecker,Close - the swell is from 170, our lines are 200 and 20 degrees 05/24/2013,16:21:17,elizabethlobecker,Our data quality in general is best at 30 deg off wind/swell 05/24/2013,17:42:23,carolruppel,Meme--maybe we should see what this line looks like (= being patient) but possibly change some acquisition params as the ship comes back down on the next one if necessary? there is more subbottom reflectivity here than is being resolved.. 05/24/2013,17:45:50,elizabethlobecker,What would you suggest? Lower tx pulse? 05/24/2013,17:48:30,carolruppel,this is the 'art' part..could try lowering power..not sure pulse length change will help much...hope we don't need to take off AGC..b/c then we have to manually deal with gains 05/24/2013,17:51:29,elizabethlobecker,16 ms tx pulse bad 05/24/2013,17:51:34,elizabethlobecker,64 tx pulse currently 05/24/2013,17:54:34,carolruppel,Think the power needs to go down; subbottom is overwhelmed...can you keep at 32 ms and try power 1 for a few min before we get on line? 05/24/2013,17:54:56,elizabethlobecker,done 05/24/2013,17:58:48,carolruppel,ok i don't know this system well. if you flick AGC off, you have to set gain manually...use TVG etc..? Do you want to take AGC off for a min? Jason isn't online, but he pointed out that things did degrade with AGC before (ironic)...the data are being recorded also as KEB/KEA so we aren't 'losing' anything up to you...do what you like 05/24/2013,18:01:54,carolruppel,this is starting to look better...sometimes you just have to wait... 05/24/2013,18:05:59,elizabethlobecker,looks decent, right? 05/24/2013,18:06:56,elizabethlobecker,Might try to take the AGC off in the next turn to see if there is any noticeable improvement. 05/24/2013,18:07:45,carolruppel,i might be a little behind, but right now we seem to be getting side-echoes...very interesting stuff...lots of gas here... 05/24/2013,18:09:33,elizabethlobecker,I think so - near the tops of the peaks. in a turn now. trying 59 dB manual gain. 05/24/2013,18:11:45,briankennedy,WE are going to reduce feed 1 to 3 Mbs to be able to more more data. 05/24/2013,18:15:07,elizabethlobecker,We should not see a change in feed 1 video quality 05/24/2013,18:15:20,elizabethlobecker,bak in auto gain 05/24/2013,18:16:02,carolruppel,yes...thx these are pretty nice...we can probably clean up with filtering 05/24/2013,18:31:40,carolruppel,Meme--hard for me to tell, but is the notch in the slope close to the crossing line (seeps strike line)? think seep might be just downdip of the notch...we could do stuff to clean up the acquisition, but ths wil definitely be amenable to post-process 05/24/2013,18:34:02,elizabethlobecker,not sure. we're in a turn, the notch in the current slope would have been at the end of the line, not near the center where the seeps are 05/24/2013,18:34:48,elizabethlobecker,idk what else to try to draw out the layers better. 05/24/2013,18:35:16,carolruppel,sorry you marked the end and begin of line on the record; i'm talking about notch in slope halfway between begin/end marks for that last line... 05/24/2013,18:35:41,carolruppel,i think the gain needs to go down, but then you have to take it off AGC and do it manually... 05/24/2013,18:36:05,elizabethlobecker,oh yes, ok, that could have been near the center/seeps 05/24/2013,18:36:11,elizabethlobecker,cant' say for sure 05/24/2013,18:44:41,elizabethlobecker,Carolyn - do you see a downslope vs upslope differnce? 05/24/2013,18:46:22,carolruppel,Yes, been noticing this most of day but was wondering if I was making it up so kept quiet...could be sea state, placement of transducers, direction coming up on bathymetry...some nonlilnear combo of those...? i was going to bring it up later with you and adam, but not sweat it right now... 05/24/2013,18:48:56,carolruppel,there's nothing you can do about side-shadows...this is some cool out of plane bathy 05/24/2013,18:56:57,carolruppel,meme--if your master is lined up on the survey line, there is nothing wrong with starting before you get directly on your track... 05/24/2013,18:57:09,carolruppel,never mind.think you just read my mind! 05/24/2013,19:03:26,carolruppel,Meme--if you want to try to take it off AGC..that is fine...i know you were thinking to try to get more of the subseafloor struct...if you want to just leave it, that is fine too 05/24/2013,19:04:53,carolruppel,Meme--NOTCH in slope! at right place... 05/24/2013,19:05:58,carolruppel,this part upslope won't have as good layering as lower part of slope...gas flowing up and attenuating features ... 05/24/2013,19:06:01,elizabethlobecker,Yes! 05/24/2013,19:06:39,elizabethlobecker,I see 05/24/2013,19:07:01,carolruppel,you have improved the acquisition with the change you made... 05/24/2013,19:07:23,elizabethlobecker,35 dB manual gain. sweet. 05/24/2013,19:19:02,elizabethlobecker,that looks pretty good! 05/24/2013,19:43:46,carolruppel,Not sure if it will help, but do you want to see if dialing back gain a little clears it up? surprised how reflective subseafloor is 05/24/2013,19:45:35,carolruppel,ok cancel that silly idea of mine! now heading into gas charged part so no point in dialing back i think sorry! 05/24/2013,19:47:09,carolruppel,Meme--that updip change where you see subseafloor layers striking into something that looks 'blanked out'...that edge of the layers is the edge of the subsurface gas body at that location 05/24/2013,19:49:25,elizabethlobecker,amazing 05/24/2013,19:49:52,elizabethlobecker,we already got the other crossline - just had to restart hypack in the middle and the trackline got lost 05/24/2013,19:50:05,carolruppel,ok GREAT!!! 05/24/2013,19:50:18,elizabethlobecker,so both lines running down the center of the two seep strings have been run 05/24/2013,19:50:38,elizabethlobecker,we usually run the subbottom until 6 05/24/2013,19:51:03,elizabethlobecker,if we finish early, will try for CTD if weather allows, or reshoot the seep string lines 05/24/2013,19:51:54,carolruppel,that's excellent; didn't know you used hypack...we love hypack and use it for everything.. 05/24/2013,19:53:55,elizabethlobecker,we use it for line planning and situational awareness. for data collection we tend to use manufacturers native software. the ROV team uses hypack for recording targets 05/24/2013,20:42:00,carolruppel,Sea state getting worse? You more x-sea than previously? More data is dropping (and not just in the turn). 05/24/2013,20:43:14,carolruppel,will stay through this line then have to fetch kid at afterschool..we will have to wait 'til we have better look at data, but there is some possibility that chirp is picking up seafloor seepage (this happens if everything is just right sometimes) in some places... 05/24/2013,20:52:55,carolruppel,Meme--I have to break off. You may need to increase power again...or put it back on AGC...or your seas may just be running at such an angle to the ship that you won't be able to get decent data. I think this part of the seep field is very rocky, with carbonate edifices, so that might be contributing to the shadows. 05/24/2013,20:53:35,elizabethlobecker,the seas are definitely picking up 05/24/2013,20:53:48,elizabethlobecker,will try a tweaking for the last couple of lines 05/24/2013,20:53:52,elizabethlobecker,thanks! 05/24/2013,20:56:18,briankennedy,ROV launch is scheduled for 0900 Saturday morning however the weather forcast is questionable 05/24/2013,21:23:32,carolruppel,wow you are up to 4...lines are definitely worse running this direction...i'm back obviously 05/24/2013,21:24:15,elizabethlobecker,hm actually not sure how that happened 05/24/2013,21:24:17,elizabethlobecker,back to 2 05/24/2013,21:24:39,elizabethlobecker,i'm going to dinner. another person is finishing up 05/24/2013,21:24:59,elizabethlobecker,this is the last line 05/24/2013,21:26:24,carolruppel,that's great thanks...this was really good today meme 05/24/2013,21:26:29,carolruppel,have a good evening!! 05/24/2013,23:46:38,briankennedy, Hopefully the next ROV dive will start at 0900 on Saturday morning but the weather does not look good.