Position ND2

file dpn9496a.a4d: Use pressures in (c)
Because of its length, the batteries ran out shortly before it was recovered
and so there was no end time to check clock drift against. The instrument was
redeployed 1996-1997 and so this data was re-processed using the next year's
drift. The timings had some uncertainty in them, as the only available
deployment time was 'time on the bottom', and this was a bit uncertain. As a
result of harmonic analysis, and user queries, we have ADDED 15 MINUTES to 
the original timings.

Drake Passage North 1994-96
Instrument  SSDL No3
Deployed at Position POL8 in November 1994
Recovered November 1996
54 56.65s  58 23.11w 1052m   delt= 15.0000853 min

3 Digiquartz pressure with in build temperature sensors
Initial scan at 1930Z 11/11/96 Day 315 Pressure time at 1922
Mean and Drift removed 15 April '97 Katie
(a)          Temperature from DQ44935 Deg C
             Pressure    from DQ44935 mBar
(b)          Temperature from DQ46267 Deg C
             Pressure    from DQ46267 mBar
(c)          Temperature from DQ52026 Deg C
             Pressure    from DQ52026 mBar
1st  Seabed Record = 1 (Corresponds to Record 441 in original
Last Seabed Record = 70027
(c) contains the best record.
15 minutes added to timings. 22 May 1998 paxe@pol.ac.uk

Stations in the Scotia Sea and Drake Passage

POL deployments in this area were first made in a section between the
Falkland Islands and Signy in the South Orkney islands. These stations
have names like 'FS1'. Recording then moved west to two deeper (4000 m)
stations on the western side of the Drake Passage ('ND1' and 'SD1'), and,
most recently, have been on a section between the Falklands and Elephant
Island along the official 'Drake Passage' hydrographic section for the
World Ocean Circulation Experiment ('ND2' and 'SD2' with the stations
including MYRTLE in between).

The nomenclature 'ND1' etc. follows that of

M.Meredith, 1995. On the temporal variability of the transport through
the Drake Passage. University of East Anglia Ph.D thesis. In other
publications, for example:

Woodworth, P.L., Vassie, J.M., Hughes, C.W. and Meredith, M.P. 1996.
A test of the ability of TOPEX/POSEIDON to monitor flows through
the Drake Passage. Journal of Geophysical Research, 101(C5), 11935-11947.

ND1 is referred to as DN92, SD1 as DS92, ND2 as DN93 and SD2 as DS93.

Most instruments were Paroscientific Digiquartz (DQ) pressure transducers
with temperature also recorded. BPR's had typically 3 sensors. Instrumental
drift has attempted to be removed from all records.