SIO Private Argo Site



     SIO ARGO floats Failure Rate Page

          Click here to return to the historical table.


The statistics displayed are based on the following definition of a float failure: If any expected Core Argo function has failed, the float is deemed to not be fulfilling its full mission, so has failed. Examples of failure include, if the float or sensor is greylisted, if the salinity data is deemed bad within DMQC, pressure sensor data is questionable, etc. as well as when transmissions stop being received.

This is a purposely conservative estimate, and should not be directly compared to other failure estimates that use more lax criteria (e.g. failure only when transmissions stop being received).


Links display daily-updated plots and values (table values last updated on December 16,2024)

SOLOII

IDG MRV
Temporal Range &
Float Grouping (Firmware or
Characteristic)		 Percent Success
(in first 5 years)		 Effective Lifetime
(years)		 # Fully
Operational
(Float+CTD)		 Percent Success
(in first 5 years)		 Effective Lifetime
(years)		 # Alive
Dec 2022 - Jan 2025
V2.6 Tadiran
"Post-Covid" Era		 Float+CTD=98.6
Float=98.9
Float+CTD=0.83
Float=0.83
122/128 -
-
-
Sep 2021 - Dec 2022
V2.6 Tadiran
"Covid" Era		 Float+CTD=78.4
Float=79.5
Float+CTD=2.07
Float=2.10
84/117 -
-
-
Dec 2019 - Jul 2021
V2.6 Tadiran
Post CTD Mfg Mod		 Float+CTD=91.3
Float=92.8
Float+CTD=4.00
Float=4.07
114/129 -
-
-
Aug 2018 - Jan 2020
V2.6 Tadiran
Pre CTD Mfg Mod		 Float+CTD=68.8
Float=91.9
(Final)
Float+CTD=3.82
Float=5.38
44/107 -
-
-
Oct 2016 - Sep 2018
V2.2-V2.5
Tadiran		 Float+CTD=88.3
Float=97.2
(Final)
Float+CTD=5.88
Float=6.89
93/144 -
-
-
Sep 2015 - Aug 2017
V2.1-V2.4
ElectroChem		 Float+CTD=87.8
Float=97.7
(Final)
Float+CTD=5.84
Float=7.26
9/92 -
-
-
Jul 2013 - Nov 2015
V1.5 & V2.0 10-day
3 Battery Pack		 Float+CTD=83.4
Float=90.4
(Final)
Float+CTD=6.04
Float=6.78
(Final)
0/236 -
-
-
Jan 2014 - Mar 2014
V1.5 Sandy Time-Scaled
3 Battery Pack		 Float+CTD=87.4
Float=90.4
(Final)
Float+CTD=6.67
Float=7.10
(Final)
0/40 -
-
-
Oct 2012 - Dec 2012
V1.3 2 Battery Pack		 80.7 (Final)
4.00 (Final)
0/20 69.8 (Final)
3.45 (Final)
0/20
Feb 2012 - Jun 2012
V1.1 & V1.2
2 Battery Pack		 86.8 (Final)
4.38 (Final)
0/30 -
-
-
Aug 2011 - Oct 2011
V1.0 2 Battery Pack		 94.9 (Final)
4.74 (Final)
0/30 71.0 (Final)
3.58 (Final)
0/20
Feb 2011 - Apr 2011
V1.0: Discovery		 30.3 (Final)
1.50 (Final)
0/15 -
-
-


SOLO

IDG
Deployment Time Range, Float Model, or Ship Percent Success
(in first 5 years)		 Effective Lifetime
(years)		 # Fully Operational
V0.5 Iridium SOLO Feb 2013 87.7 (Final) 7.31 (Final) 0/12
V0.5 Iridium SOLO Feb 2012 - Nov 2012 59.1 (Final) 4.36 (Final) 0/16
Format 19 Argos SOLO Feb 2011 - Mar 2012 91.4 (Final) 5.68 (Final) 0/56
Format 19 Argos SOLO Nov 2009 - Dec 2010 89.9 (Final) 5.53 (Final) 0/121
Format 19 Argos SOLO Oct 2007 - Mar 2009
(Microleak Era)		 74.7 (Final) 4.40 (Final) 0/163
Format 19 Argos SOLO Aug 2006 - Jul 2007 83.3 (Final) 5.42 (Final) 0/144
Format 19 Argos SOLO Mar 2005 - Mar 2006 84.4 (Final) 4.34 (Final) 0/188
Format 19 Argos SOLO Feb 2004 - Dec 2004 76.8 (Final) 4.05 (Final) 0/128
Format 19 Argos SOLO Oct 2002 - Nov 2003 54.3 (Final) 2.78 (Final) 0/95
Formats 17&18 Argos SOLO Jun 2000 - Feb 2002 25.13 (Final) 1.25 (Final) 0/65


Percent Success is the percentage of cycles completed within first 5 years (any cycles outside first 5 years are not counted)

Effective Lifetime is the average lifetime of floats within the group (counts all cycles)


station map station map


Graphical representation of SOLO-II float groupings success history. Data in the left panel tracks both float and CTD health. Data in the right panel tracks float success only, ignoring the health of the CTD.

Notes:
V2.6 is split between those pre/post Seabird CTD Manufacturing modifications
V2.2 first float group with a significant number of floats with Tadiran battery packs
V1.5 First float group with 3-battery packs (4.5 MJ) and passivation mediation