GDP Weekly Array Status Update



Composition of the Global Drifter Array on 25-Sep-2023:

DBi : 393
Pacif.Gyre: 365
SIO : 126
Metocean: 96
Unknown: 71
NKE : 36
Marlin Yug: 2
TOTAL: 1089



Number of Iridium drifters: 1089

Fraction of array that is Iridium: 100.0 percent

Array size on 18 Sep 2023: 1094 drifters


Added IDs (9):

300234066570320 300534062099720 300534062489950 300534062585100 300534063019390 300534064649980 300534064703240 300534064709730 300534064709880


Lost IDs (14):

300234064018240 300234066338830 300234066430400 300234066439220 300234066439880 300234068343730 300534061071640 300534061384200 300534061397950 300534062025800

300534062123370 300534063319660 300534063488680 300534064401710


Net change: 9 - 14 = -5

New array size on 25 Sep 2023: 1089 drifters.


Death rate: 16.0 deaths per 1250 drifters per 7 days (836 deaths per 1250 per year).


Mean age of dead drifters: 762 days. Median: 704 days.


Deplog information for dead drifters (underlined: aground/picked up):

ID   WMO#  DepDate   DepLat  DepLon   ShipManufacturer  Type   Prgm
300534061071640 6204563 03-Apr-2021 34.8 -62.0 UNKNOWN NKE  BD2GI  2222
300234066430400 5401748 28-Nov-2020 -60.0 -174.6 R/V ARAON Pacific Gy BD2GI  21312
300234068343730 4402652 23-Aug-2020 60.0 -47.2 R/V MARIA S. MESIO  SVPGHI  21312
300234066439220 1601650 15-Aug-2019 -52.0 71.0 ASTROLABE Pacific Gy BD2GI  21321
300234066439880 6202640 06-Jun-2019 19.8 -41.0 COLIBRI Pacific Gy BD2GI  21321
300234066338830 1701582 28-Apr-2019 -55.0 30.0 THOMAS THOMPSONPacific Gy BD2GI  21312
300234064018240 3101511 17-Oct-2018 -38.6 -53.9 Brazilian NAVY Metocean  BD2GI  31312


Specification sheet info for dead drifters not in deployment log (underlined: aground/picked up):

not in spec sheetnot in spec sheetnot in spec sheet
ID   MANUFACTURER  TYPE   TRANSMISSION
300534064401710:  
300534061397950:  
300534062025800 DBi BD2A3 
300534063488680:  
300534061384200 DBi SVP3A3 
300534063319660 NKE BD2A3 
300534062123370 DBi    SBD 9602