GDP Weekly Array Status Update

Composition of the Global Drifter Array on 27-Jul-2026:

Pacif.Gyre: 531
SIO : 184
Metocean: 155
DBi : 131
Unknown: 95
NKE : 30
TOTAL: 1126



Number of Iridium drifters: 1126

Fraction of array that is Iridium: 100.0 percent

Array size on 20 Jul 2026: 1130 drifters


Added IDs (16):

300534068955230 300534061658500 300534065068020 300534065069040 300534065069080 300534065160570 300534065161330 300534065169630 300534065953180 300534067584220

300534067584230 300534067584240 300534067584340 300534067584350 300534067811690 300534067814600


Lost IDs (20):

300534065821530 300534064352320 300534065825550 300534067031390 300534067527370 300534065822560 300534065826510 300534065826540 300534067520380 300534063013260

300534063014290 300534061659110 300534061758080 300534063010380 300534063012300 300534064392310 300534065071690 300534065175740 300534065379940 300534064234480


Net change: 16 - 20 = -4

New array size on 27 Jul 2026: 1126 drifters.


Death rate: 22.2 deaths per 1250 drifters per 7 days (1156 deaths per 1250 per year).


Mean age of dead drifters: 490 days. Median: 406 days.


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

ID WMO# DepDate DepLat DepLon ShipManufacturer Type Prgm


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

not in spec sheet
ID MANUFACTURER TYPE TRANSMISSION
300534067520380:
300534065825550MetoceanBD2GHI
300534065826540MetoceanBD2GHI
300534064352320MetoceanBD2GHI
300534067031390MetoceanBD2GHI
300534067527370MetoceanBD2GHI
300534065821530MetoceanBD2GHI
300534065822560MetoceanBD2GHI
300534065826510MetoceanBD2GHI
300534064234480SIOBD2VHI
300534065175740SIOBD2GHI
300534065379940Pacific GySVP3A3
300534065071690SIOBD2GHI
300534061758080SIOBD2GHI
300534063014290Pacific GyBD2A3
300534064392310Pacific GySVP3A3
300534063013260Pacific GyBD2A3
300534063012300Pacific GyBD2A3
300534063010380Pacific GyBD2A3
300534061659110Pacific Gyre SBD 9602