SOCRATES chat log RF04

[2018/01/23 22:21:43 UTC] <jemmett_GV> Note: We need to change the 1PPS selection switch on the firefly
[2018/01/23 22:39:57 UTC] <jemmett_GV> Firefly 1PPS error
[2018/01/23 22:41:30 UTC] <jemmett_GV> Is this normal or a problem?
[2018/01/23 22:42:59 UTC] <Pei-iPhone> jemmett_GV: I don’t think I have seen it yet. Good to keep an eye though
[2018/01/23 22:43:17 UTC] <Pei-iPhone> Now we are using Spectracom, so it’s not a problem
[2018/01/23 22:43:43 UTC] <Pei-iPhone> Plus, we really only need accurate 1PPS when we start hcrdrx
[2018/01/23 22:44:07 UTC] <jemmett_GV> Pei-iPhone, Ok, I'll keep an eye on it
[2018/01/23 22:44:12 UTC] <Pei-iPhone> Once hcrdrx started, it doesn’t really matter
[2018/01/23 22:44:43 UTC] <Pei-iPhone> jemmett_GV: what is the error message?
[2018/01/23 22:45:31 UTC] <jemmett_GV> 1 PPs offset from GPS: -2.69e -07s
[2018/01/23 22:47:38 UTC] <Pei-iPhone> Our PRT is 100 microsecond and this error is 0.2 microsecond. This is not a problem
[2018/01/23 22:51:36 UTC] <jemmett_GV> Pei-iPhone, I'll just keep watching it
[2018/01/23 23:02:45 UTC] <jemmett_GV> starting engines
[2018/01/23 23:06:46 UTC] <jemmett_GV> Firefly PLL Lock error gone
[2018/01/23 23:07:26 UTC] <jemmett_GV> Green light at "1 PPS offset from GPS: -2.48e-07s"
[2018/01/23 23:08:27 UTC] <jemmett_GV> taxing
[2018/01/23 23:10:27 UTC] <jemmett_GV> Turn on filament
[2018/01/23 23:12:58 UTC] <jemmett_GV> tx on
[2018/01/23 23:17:43 UTC] <jemmett_GV> Laser on
[2018/01/23 23:21:33 UTC] <jemmett_GV> nadir pointing
[2018/01/23 23:37:22 UTC] <jemmett_GV> data drop @ 23:36:40
[2018/01/23 23:38:37 UTC] <jemmett_GV> slight turn ~23:36
[2018/01/23 23:47:55 UTC] <ChrisBurghart-ops> jemmett_GV, Surface Vr values look good so far. Maybe even a touch better after the last turn.
[2018/01/23 23:49:34 UTC] <jemmett_GV> For the calibration scanning, do we start scanning immediately after the sonde is released?
[2018/01/23 23:50:57 UTC] <ChrisBurghart-ops> jemmett_GV, Yes. We just need the cal taken near the sonde drop so we know the moisture profile of the atmosphere for cal correction.
[2018/01/23 23:51:14 UTC] <jemmett_GV> We might have a clear patch around 48S, so we will use this present sonde for the calibration
[2018/01/23 23:53:05 UTC] <ChrisBurghart-ops> Agreed. Based on the satellite image, it looks like it will be reasonably clear for a while starting at 48S.
[2018/01/23 23:53:57 UTC] <jemmett_GV> data 5 sec gap 23:52
[2018/01/23 23:54:35 UTC] <jemmett_GV> Lidar flight level changed back to boulder altitude
[2018/01/23 23:54:48 UTC] <jemmett_GV> Lidar is back at normal flight level
[2018/01/23 23:55:27 UTC] <ChrisBurghart-ops> jemmett_GV, Must have lost altitude briefly in the ADS IWG1 stream.
[2018/01/23 23:57:36 UTC] <vivek_> HCR  dBZ > 20 in strato cu  at 23:48; desired data for cal
[2018/01/23 23:57:51 UTC] <jemmett_GV> 5 sec data gap 23:56:45
[2018/01/24 00:04:21 UTC] <jemmett_GV> sonde out
[2018/01/24 00:04:37 UTC] <jemmett_GV> starting fast scan 160-200, 3deg
[2018/01/24 00:06:31 UTC] <jemmett_GV> Some clouds below, large white caps
[2018/01/24 00:08:16 UTC] <jemmett_GV> starting slow scan 168-172, 0.5 deg
[2018/01/24 00:09:10 UTC] <jemmett_GV> starting slow scan 188-192, 0.5 deg
[2018/01/24 00:09:58 UTC] <jemmett_GV> resuming nadir pointing
[2018/01/24 00:11:04 UTC] <jemmett_GV> 5 sec data gap 09:30ish
[2018/01/24 00:15:53 UTC] <Pei-iPhone> jemmett_GV: you may see more frequent gaps as time goes. It’s a known trend
[2018/01/24 00:19:41 UTC] <Pei-iPhone> jemmett_GV: one thing forgot to mention: you may need to remind Jeff when you fly over the ship to stay a bit away from it
[2018/01/24 00:20:15 UTC] <Pei-iPhone> They have been flying about 1 mike west of the Investigator
[2018/01/24 00:25:01 UTC] <jemmett_GV> Pei-iPhone, thanks we are discussing this currently.
[2018/01/24 00:28:19 UTC] <jemmett_GV> slight turn
[2018/01/24 00:34:15 UTC] <jemmett_GV> cool returns at 31:00-32:00
[2018/01/24 00:35:45 UTC] <ScottEllis-Boulder> vivek-ops, I see that strong echo at 23:48 completely extincted the signal. First time I have seen that!
[2018/01/24 00:38:59 UTC] <ScottEllis-Boulder> jemmett_GV, those are cool echoes! Pretty strong updrafts too.
[2018/01/24 00:41:15 UTC] <vivek-ops> ScottEllis_B Yes, somehow we are seeing a number of strong echoes today in warm rain
[2018/01/24 00:46:34 UTC] <ScottEllis-Boulder> vivek-ops, we can try to use some of them for a cal check?
[2018/01/24 00:46:58 UTC] <vivek-ops> Yes
[2018/01/24 00:50:45 UTC] <ChrisBurghart-ops> jemmett_GV, High frequency pillars in the last Vr image. Is it bumpy up there?
[2018/01/24 00:51:26 UTC] <jemmett_GV> ChrisBurghart-ops, it is a little bumpy.  We are right at the cloud tops.
[2018/01/24 00:53:43 UTC] <ChrisBurghart-ops> jemmett_GV, I'm assuming the Spectracom light is red by now :-), but is everything else green?
[2018/01/24 00:54:17 UTC] <jemmett_GV> ChrisBurghart-ops, that is correct
[2018/01/24 01:04:11 UTC] <jemmett_GV> 5 sec gap, 1:03
[2018/01/24 01:12:08 UTC] <jemmett_GV> a little bouncy up here, as seen in the vel
[2018/01/24 01:13:17 UTC] <jemmett_GV> nosetip icing and a little on the leading edge of the wing.
[2018/01/24 01:17:21 UTC] <ChrisBurghart-ops> There was also a 5 second gap at 01:01:30 (90 seconds before the 01:03:00 gap noted above).
[2018/01/24 01:20:11 UTC] <ChrisBurghart-ops> jemmett_GV, surface Vr numbers seem to be drifting a little bit positive. Any chance for an S-turn?
[2018/01/24 01:21:24 UTC] <jemmett_GV> ChrisBurghart-ops, coming up on the boat in a few minutes.  Maybe after that.
[2018/01/24 01:22:03 UTC] <ChrisBurghart-ops> They've been turning when they get near the boat, so maybe we'll get a freebie.
[2018/01/24 01:24:04 UTC] <jemmett_GV> over boat now
[2018/01/24 01:24:15 UTC] <jemmett_GV> turning
[2018/01/24 01:26:59 UTC] <jemmett_GV> Vr numbers much better now
[2018/01/24 01:30:55 UTC] <ChrisBurghart-ops> I'm wondering if it would be worthwhile to generate 1-minute averages of mean surface Vr, at least when we're flying straight and level. It might give us a good indication of INS drift.
[2018/01/24 01:33:21 UTC] <jemmett_GV> ChrisBurghart-ops, that seems like a worthwhile thing to try.
[2018/01/24 01:33:42 UTC] <ChrisBurghart-ops> jemmett_GV, The after-turn Vr image just got to the catalog. It does look a lot better.
[2018/01/24 02:01:14 UTC] <jemmett_GV> 5 sec data gap, 02:00:15
[2018/01/24 02:05:08 UTC] <jemmett_GV> Latitude 60 deg S, dropping to 13,000ft
[2018/01/24 02:11:24 UTC] <jemmett_GV> 10 min legstart
[2018/01/24 02:11:31 UTC] <jemmett_GV> 10 min leg start
[2018/01/24 02:11:48 UTC] <jemmett_GV> 500 ft above cloud
[2018/01/24 02:19:28 UTC] <vivek-ops> Pillars in velocity
[2018/01/24 02:19:34 UTC] <jemmett_GV> Vr bias slightly negative, turning soon.
[2018/01/24 02:21:38 UTC] <jemmett_GV> can see icebergs
[2018/01/24 02:21:54 UTC] <jemmett_GV> descending
[2018/01/24 02:22:11 UTC] <jemmett_GV> correction, turning
[2018/01/24 02:25:20 UTC] <jemmett_GV> descending
[2018/01/24 02:31:34 UTC] <jemmett_GV> radar and laser zenith pointing
[2018/01/24 02:32:05 UTC] <jemmett_GV> still dropping to 500ft
[2018/01/24 02:32:25 UTC] <jemmett_GV> seas look pretty calm
[2018/01/24 02:32:26 UTC] <vivek-ops> Scott: Distinct pillars in velocity 1:55: 2:00
[2018/01/24 02:34:27 UTC] <jemmett_GV> 10 min leg start now
[2018/01/24 02:36:03 UTC] <jemmett_GV> really calm seas
[2018/01/24 02:39:00 UTC] <Pei-iPhone_> jemmett_GV:
[2018/01/24 02:40:00 UTC] <ScottEllis-Boulder> vivek-ops, You are right. Those look like the 15 to 20 second period variations related to the pitch changes in the GV.
[2018/01/24 02:41:15 UTC] <ScottEllis-Boulder> It is interesting, because I didn't see it too much in RF03
[2018/01/24 02:41:31 UTC] <ChrisBurghart-ops> Surface Vr looks like it shifted more positive around 01:46, but improved again after the aircraft turnaround ~02:22.
[2018/01/24 02:43:40 UTC] <jemmett_GV> climbing
[2018/01/24 02:43:48 UTC] <ScottEllis-Boulder> ChrisBurghart-ops, interesting. I am looking forward to comparing the INS systems
[2018/01/24 02:47:59 UTC] <ChrisBurghart-ops> ScottEllis-Boulder, the track shows a good upwind leg from about 02:32-02:42
[2018/01/24 02:48:39 UTC] <ChrisBurghart-ops> Never mind, we're pointing zenith for that upwind leg...
[2018/01/24 02:49:04 UTC] <ScottEllis-Boulder> ChrisBurghart-ops, thanks for looking out for upwinders. Bummer about the zenith.
[2018/01/24 02:49:42 UTC] <ScottEllis-Boulder> There was a pretty good upwind section yesterday during maneuvers that showed good tilt correction numbers.
[2018/01/24 02:53:33 UTC] <jemmett_GV> nadir pointing
[2018/01/24 02:53:40 UTC] <jemmett_GV> incloud leg for 10 min
[2018/01/24 03:02:02 UTC] <jemmett_GV> seeing pillars in vel again. just a little bumpy, more higher freq.
[2018/01/24 03:04:45 UTC] <jemmett_GV> descending
[2018/01/24 03:08:15 UTC] <jemmett_GV> seeing more frequent data gaps
[2018/01/24 03:10:04 UTC] <ScottEllis-Boulder> jemmett_GV, I agree. We might be seeing turbulence plus some broader pillars from the pitch changes.
[2018/01/24 03:10:04 UTC] <jemmett_GV> 03:09:10, another 5 sec data gap
[2018/01/24 03:12:06 UTC] <ptsai> jemmett_GV, I just went through the images in the last 5 hours. There are 9 incidents of 5-sec gaps.
[2018/01/24 03:13:06 UTC] <ptsai> jemmett_GV, correction. Last 3 hours.
[2018/01/24 03:13:20 UTC] <jemmett_GV> zenith pointing
[2018/01/24 03:14:58 UTC] <jemmett_GV> ptsai, that seems about the same amount / frequency from the previous flights, right?
[2018/01/24 03:18:49 UTC] <jemmett_GV> nadir pointing
[2018/01/24 03:20:01 UTC] <jemmett_GV> 10 min leg
[2018/01/24 03:20:14 UTC] <jemmett_GV> 500 ft above cloud
[2018/01/24 03:21:27 UTC] <ChrisBurghart-ops> There's an unusual very brief data gap (~one second?) at 3:05:55.
[2018/01/24 03:22:26 UTC] <ptsai> jemmett_GV, correct. I don't think it's worsen.
[2018/01/24 03:22:39 UTC] <ptsai> I haven't counted RF03 but it looks similar
[2018/01/24 03:34:05 UTC] <jemmett_GV> zenith pointing
[2018/01/24 03:36:13 UTC] <jemmett_GV> coming up on the boat
[2018/01/24 03:41:48 UTC] <jemmett_GV> 10 min leg
[2018/01/24 03:45:57 UTC] <jemmett_GV> 03:42, passed boat @ 500 ft
[2018/01/24 03:47:03 UTC] <ptsai> jemmett_GV, holy. I hope you are far enough. HCR still working?
[2018/01/24 03:47:48 UTC] <ptsai> You see the boat>?
[2018/01/24 03:48:22 UTC] <ChrisBurghart-ops> Anyone on deck, or are the seas too rough?
[2018/01/24 03:51:18 UTC] <jemmett_GV> ptsai, saw the boat!!
[2018/01/24 03:51:55 UTC] <jemmett_GV> ChrisBurghart-ops, I'm not sure.
[2018/01/24 03:52:08 UTC] <jemmett_GV> climbing
[2018/01/24 03:52:29 UTC] <Pei-iPhone> jemmett_GV: done with profiling?
[2018/01/24 03:52:39 UTC] <jemmett_GV> climbing to above cloud
[2018/01/24 03:56:32 UTC] <jemmett_GV> nadir pointing
[2018/01/24 03:57:54 UTC] <jemmett_GV> descending into in-cloud leg
[2018/01/24 04:03:40 UTC] <jemmett_GV> climbing
[2018/01/24 04:06:00 UTC] <jemmett_GV> done with profiling
[2018/01/24 04:08:59 UTC] <jemmett_GV> heading back to Hobart
[2018/01/24 04:39:53 UTC] <jemmett_GV> ETA 5:11 Local Time
[2018/01/24 04:51:44 UTC] <jemmett_GV> S turns for INS's
[2018/01/24 04:52:38 UTC] <jemmett_GV> maybe not yet (S turns)
[2018/01/24 04:59:52 UTC] <jemmett_GV> S turns for INS's now
[2018/01/24 05:05:07 UTC] <ChrisBurghart-ops> It does look like it's drifted again, though.
[2018/01/24 05:09:08 UTC] <jemmett_GV> ChrisBurghart-ops, maybe a little bit.  The pilots asked we needed another S turn, I said it can't hurt.
[2018/01/24 05:47:18 UTC] <jemmett_GV> stopping laser
[2018/01/24 05:54:23 UTC] <jemmett_GV> noisecal
[2018/01/24 06:00:04 UTC] <jemmett_GV> end noisecal
[2018/01/24 06:01:08 UTC] <jemmett_GV> stop hcrdrx