july 19, 2010 seattle, wa

Aquarius/SAC-D Science Team Meeting

July 19, 2010Seattle, wA

Aquarius Data Processing System (ADPS)and Data Distribution

Fred Patt

2 of 29July 19-21, 2010

ADPS and Data DistributionAquarius/SAC-D Science Team Meeting

• Overview• Science Data Processing• Level-2 Science Software Implementation• Level-2 Data Product Format• Data Archive and Distribution• Aquarius Web Site• What We Need

Agenda

3 of 29July 19-21, 2010


Aquarius Data Processing System Overview

• The Aquarius Ground System at NASA/GSFC consists of the Aquarius Data Processing System (ADPS) and the Aquarius Command and Control System.

• The ADPS will support:– Acquisition and ingest of Aquarius/SAC-D data from CONAE.– Acquisition of dynamic ancillary required to support the science processing.– Processing of Aquarius data to standard product levels using algorithms provided

by the Science Team.– Quality control of data products using methods specified by the Science Team.– Match-up of Aquarius data with in situ salinity measurements.– Archive and distribution of all data products during the active life of the mission to

the science team and general science community.– Delivery of source data (Level-1a) and “validated” Level-2 and Level-3 derived

data products to the PO.DAAC.

• The ADPS will be supported within the existing infrastructure of the Ocean Biology Processing Group (OBPG).

4 of 29July 19-21, 2010


• Overview and Status• Science Data Processing• Level-2 Science Software Implementation• Level-2 Data Product Format• Data Archive and Distribution• Aquarius Web Site• What We Need

Agenda

5 of 29July 19-21, 2010


Aquarius Data Processing Overview

Level-0 Preprocessor

Level-0 to 1A

Level-1A to 2

Level-1A Merge

Raw Level-0Downlink

File

Level-1Aorbit

Level-2

Level-3 Map

SAC-DHKT Data

Level-2 to 3Binning

Level-2 to 3Smoothing

Level-3 Binning

Level-3 Mapping

DynamicAncillary

Data

StaticAncillary

Data

Level-1Atemp

Level-0

Level-3 Bin

Level-0Report

Level-1aReport

Automated TelemetryAnalysis Tool

Standard Data ProcessingWeb-Based Telemetry Monitoring Tools

TelemetryReport

PredictedDownlink

Times

In-Situ Match-upProcess

Level-2Match-upAVDSBias Adjustment

Web-Based Browse, Download and Order Tools

CONAE-providedInteractive Telemetry

Analysis Tool

SAC-DHKT Data

6 of 29July 19-21, 2010


Science Data ProcessingThe Aquarius science data processing consists of the following steps:

• Level-0 Preprocessor – process each HRD downlink file to produce a single time-ordered set of Aquarius science blocks and removes duplicates– developed by Joel Gales - ADPS.

• Level-0-to-1A – separate Level-0 files into orbits, unpack science data, incorporate overlapping ephemeris and SAC-D HKT and convert Aquarius HKT – developed by Joel Gales - ADPS.

• Telemetry Analysis – HKT data from Level-1A files analyzed for web display on the Aquarius web site – developed by Susie Kennison, Norman Kuring and Liang Hong - ADPS/ACCS.

• Interactive Telemetry Analysis - HKT files analyze using CONAE-provided telemetry viewer. • Level-1A Merge – consolidate Level-1A files from overlapping downlinks into a single, best-

quality full orbit product – Joel Gales - ADPS.• Level-1A-to-2 – perform calibration, atmospheric correction and salinity retrieval for Aquarius

science data – radiometer and scatterometer code delivered by RSS and JPL, respectively; integration and input/output code developed by Joel Gales and Liang Hong - ADPS.

• Level-2-to-3 Binning – Level-2 salinity retrievals for one day geographically projected and collected into equal-area bins – existing OBPG software modified by Joel Gales- ADPS.

• Level-2-to-3 Smoothing – Level-2 salinity retrievals for one day optimally interpolated into equal-area bins – algorithm by Jonathan Lilly/ESR implemented by Joel Gales - ADPS.

• Level-3 Binning and Mapping – Level-3 binned files aggregated to longer time periods (weekly, monthly, etc.) and projected onto map grid – existing OBPG software.

All processing steps are run automatically when all input data sets are available.All software exists in at least preliminary prelaunch form at this time.

7 of 29July 19-21, 2010


• Radiometer and Scatterometer 2009 code deliveries have been integrated and installed in the data processing system.

• Latest versions of Level-1A and Level-3 software have been installed.• Ancillary data to support processing have been acquired and ingested.• The one-year (2007) simulated data set has been processed to Level-

1A, Level-2 and Level-3 products:– http://oceancolor.gsfc.nasa.gov/cgi/aquarius (Level1A/2 browser)– http://oceancolor.gsfc.nasa.gov/cgi/l3 (Level-3 browser)– http://oceandata.sci.gsfc.nasa.gov/Aquarius (FTP-like interface)

• The PO.DAAC is downloading the simulated data products and making them available (see poster by Gregg Foti).

• AVDS processing is in progress with the 2007 data set.

Science Code Status

http://oceancolor.gsfc.nasa.gov/cgi/aquarius

http://oceancolor.gsfc.nasa.gov/cgi/l3

http://oceandata.sci.gsfc.nasa.gov/Aquarius

8 of 29July 19-21, 2010


• From now until launch we need to:

– Integrate Radiometer and Scatterometer code updates into data processing system.

– Incorporate additional quality flags into software and products.– Develop ingest procedures for additional ancillary data required by

new code.– Incorporate SAC-D HKT format into Level-1A processing.– Verify output products with Science Team.– Begin real-time mission simulation (August 2010 --> Launch).– Incorporate additional prelaunch updates into the science software

(as needed).– Participate in mission tests as scheduled.

Science Code TBD

9 of 29July 19-21, 2010


• Overview and Status• Science Data Processing• Level-2 Science Software Implementation• Level-2 Data Product Format (separate presentation)• Data Archive and Distribution• Aquarius Web Site• What We Need

Agenda

10 of 29July 19-21, 2010


Level-2 Software Implementation

Implemented using software delivered by RSS and JPL with I/O by Joel Gales

Capabilities:• Processes a Level-1A input product.• Performs radiometer Level-1B calibration and Level-2 processing using

latest code from RSS.• Performs scatterometer Level-1B calibration and Level-2 processing using

latest code from JPL.• Reads SST, wind, atmospheric, sea ice and solar flux data from dynamic

ancillary files.• Computes geolocation.• Generates HDF5 output product.

11 of 29July 19-21, 2010


Level 2 Processing Flow

Look-upTables

Level-1A Product

L2gen_aquarius

Level-2Product

QMETAncillary

Files

atm_tb_aquarius

L2gen_scatter

RadiometerAncillary

Files

ScatterometerASCII Files

mk_aquarius_ancillary_data

Solar FluxAncillary

Data

SSTAncillary

Files

StaticAncillary

Files

ATMAncillary

Files

Sea IceAncillary

Files

Look-upTables

12 of 29July 19-21, 2010


Dynamic Ancillary Data

Data Type Source InterfaceGeopotential height, surfaceTemperature at surfaceAtmospheric pressure at surfaceRelative humidity, entire atmospherePrecipitable waterCloud waterU/V wind 10 mSoil moistureGeopotential height (profile)Temperature (profile)Relative humidity (profile)Cloud water mixing ratio (profile)

NCEP Primary: tads1u.ecs.nasa.govSecondary: dss.ucar.edu

Sea Surface Salinity (model) FSU/JPL Primary: ourocean.jpl.nasa.gov/SSS/

Sea Surface Temperature Reynolds (NCEP) Primary: eclipse.ncdc.noaa.gov

Significant Wave Height NCEP Primary: polar.ncep.noaa.gov/pub/waves

Solar Flux and Flares at 1.4 GHz USAF (NGDC) Primary: www.swpc.noaa.gov/ftpdir/latest/dayind.txt -- production

Sea Ice Concentration/ Extent/Age NSIDC

Primary: polar.ncep.noaa.gov/pub/cdas/archive -- for 2007 simulation polar.ncep.noaa.gov/pub/cdas/ -- for production

http://oceancolor.gsfc.nasa.gov/cgi/l3

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Agenda

14 of 29July 19-21, 2010


Aquarius Level-2 Product Content

• This will actually be a combined Level 1B / Level 2, radiometer/scatterometer product.

• The current product specification incorporates updated parameter lists based on the recent code deliveries from the radiometer and scatterometer teams.

• Specific parameters to be output are configurable at runtime.• Parameters are output per beam and block (1.44 sec)• All output products include standard metadata, flags and

geolocation fields.

15 of 29July 19-21, 2010


Radiometer Parameters (1 of 2)

Name Long Name Implementationrad_TaH Radiometer Ta H polarization Currentrad_TaV Radiometer Ta V polarization Currentrad_Ta3 Radiometer Ta 3rd Stokes Current

rad_toi_H Radiometer Top of the Ionosphere Tb H polarization Current

rad_toi_V Radiometer Top of the Ionosphere Tb V polarization Current

rad_toi_3 Radiometer Top of the Ionosphere Tb +45 polarization Current

rad_toa_H Radiometer Top of the Atmosphere Tb H polarization Current

rad_toa_V Radiometer Top of the Atmosphere Tb V polarization Current

rad_far_TaH Radiometer Faraday Angle Currentrad_TbH Earth surface Tb H polarization Currentrad_TbV Earth surface Tb V polarization CurrentSSS Sea Surface Salinity Current

16 of 29July 19-21, 2010


Radiometer Parameters (2 of 2)

Name Long Name Implementationrad_galact_Ta_dir_V Radiometer galactic direct correction V polarization Currentrad_galact_Ta_dir_H Radiometer galactic direct correction H polarization Currentrad_galact_Ta_dir_3 Radiometer galactic direct correction 3rd Stokes Currentrad_galact_Ta_ref_V Radiometer galactic reflected correction V polarization Currentrad_galact_Ta_ref_H Radiometer galactic reflected correction H polarization Currentrad_galact_Ta_ref_3 Radiometer galactic reflected correction 3rd Stokes Currentrad_solar_Ta_dir_V Radiometer solar direct correction V polarization Currentrad_solar_Ta_dir_H Radiometer solar direct correction H polarization Currentrad_solar_Ta_dir_3 Radiometer solar direct correction 3rd Stokes Currentrad_solar_Ta_ref_V Radiometer solar reflected correction V polarization Currentrad_solar_Ta_ref_H Radiometer solar reflected correction H polarization Currentrad_solar_Ta_ref_3 Radiometer solar reflected correction 3rd Stokes Currentrad_rain_Tb Rain effect on brightness temperature Plannedrad_moon_Ta Lunar effect on antenna temperature Plannedrad_rough_corr Derived wind and/or roughness correction Plannedscat_rough_corr Scatterometer-based TB roughness correction Plannedrad_o2_wv_abs O2/water vapor absorption Plannedrad_atm_emiss Atmospheric emission Plannedrad_cosmic_Ta Radiometer Cosmic Ta correction Planned

17 of 29July 19-21, 2010


Scatterometer Parameters (1 of 2)

Name Long Name Implementation

scat_VV_ant TOI Scatterometer normalized radar cross-section (NRCS) for VV polarization Current

scat_HH_ant TOI Scatterometer NRCS for HH polarization Currentscat_HV_ant TOI Scatterometer NRCS for HV polarization Currentscat_VH_ant TOI Scatterometer NRCS for VH polarization Current

scat_VV_TOA Scatterometer NRCS for VV polarization after Faraday rotation correction Current

scat_HH_TOA Scatterometer NRCS for HH polarization after Faraday rotation correction Current

scat_HV_TOA Scatterometer NRCS for HV polarization after Faraday rotation correction Current

scat_VH_TOA Scatterometer NRCS for VH polarization after Faraday rotation correction Current

scat_wind_speed Scatterometer wind speed Current

18 of 29July 19-21, 2010


Scatterometer Parameters (2 of 2)

Name Long Name Implementation

dTB_V Delta Tb derived from scatterometer data for V polarization and beam Planned

dTB_H Delta Tb derived from scatterometer data for H polarization and beam Planned

Kpc_VV Kpc statistical uncertainty for VV NRCS PlannedKpc_HH Kpc statistical uncertainty for HH NRCS PlannedKpc_HV Kpc statistical uncertainty for HV NRCS PlannedKpc_VH Kpc statistical uncertainty for VH NRCS Plannedwind_uncertainty Estimated wind speed error PlanneddTB_V_uncertainty Uncertainty in delta-Tb-V PlanneddTB_H_uncertainty Uncertainty in delta-Tb-H Plannedscat_total NRCS for total power PlannedKpc_total Statistical uncertainty for total power NRCS Planned

19 of 29July 19-21, 2010



Agenda

20 of 29July 19-21, 2010


ADPS Data Archive and Distribution

• Overview of the currently operational web-based browse, order and distribution tool that is available to support the distribution of Aquarius data within the Aquarius Data Processing System that also serves as a data quality monitoring tool for both internal and external use.

21 of 29July 19-21, 2010


Aquarius Level-1-2 Data Browserhttp://oceancolor.gsfc.nasa.gov/cgi/aquarius

22 of 29July 19-21, 2010


Aquarius Level-1-2 Data Browserhttp://oceancolor.gsfc.nasa.gov/cgi/aquarius

23 of 29July 19-21, 2010


All Beams - daily

Aquarius Level-3 Data Browserhttp://oceancolor.gsfc.nasa.gov/cgi/l3

http://aquarius.nasa.gov/

24 of 29July 19-21, 2010



Agenda

25 of 29July 19-21, 2010


Aquarius Website

Consolidated Data access,

Information,

Services and

Community Feedback

26 of 29July 19-21, 2010


Aquarius Wiki

Online Documentation and Software Descriptions available online at:

http://aquarius.nasa.gov/

Under Data and Documents Link labeled “Aquarius Ground System and Mission Operations Wiki Documentation”

27 of 29July 19-21, 2010



Agenda

28 of 29July 19-21, 2010


What We Need

• Review and analysis of the 2007 simulation products • Agreement on the ancillary data sets and sources.• Agreement on the Level-2 parameters.• Agreement on the at-launch processing baseline (e.g., NCEP

winds).• Schedule and responsibility for algorithm and software updates

between now and launch.

29 of 29July 19-21, 2010


Backup Slides

30 of 29July 19-21, 2010


Ground System Interfaces

ADPS ACCSAquarius AquariusData Command &Processing ControlSystem System

CONAEData Mission RFArchive Operations Services

CommandCenter

Aquarius Command SchedulesAnd Reports

S-Band

X-Band Wallops Svalbard Alaska McMurdo

NASA Ground Network

Science Team andAlgorithm Providers

S-Band

Algorithms &Science Code

Evaluation Products

Ancillary Data Sources

CommandsReal-TimeTelemetry &Coordination

Schedule ConfirmationAnd Reports

AVDS Aquarius ValidationData System PO.DAAC

Level 1, 2, 3Aquarius Data

Data Users andScience Team

Aquarius L1, 2, 3 DataAncillary DataFeedback

SeaDAS Software

X-Band

ASI Matera

Cordoba

Principal Investigator andScience Planning Team

Calibration &Instrument

ConfigurationChange Requests Instrument

Engineering TeamAquarius Instrument Testbed

Flight Software Updates

ASI Malindi

1- SAC-D Ground System to Aquarius Ground System ICD2- SAC-D / NASA PSLA, Network Requirements Document & Scheduling Interface3- SD - Observatory Ground IF Specification Document4- Aquarius Science Team to Aquarius Ground System ICD5- AQ - Aquarius Ground System – Aquarius Instrument Team Anomaly ICD and Aquarius Test bed User Manual6- Aquarius Data Product User Guide (PO.DAAC) & Format Specification (ADPS)7- Ocean Data Processing System Data and Software Management Plan, ATBD’s and Software User’s Guides8- A V D S to A D P S ICD9- Aquarius Ground System to PO.DAAC ICD

Insitu DataBias Adjustments

Aquarius Match-up Data

Aquarius Data, SAC-D Telemetry and OrbitProducts

CUSS CODS

31 of 29July 19-21, 2010


Aquarius Software Status

For each software module, we will show:• High-level flow (inputs and outputs).• Current status and capabilities.• Remaining work to be done.

Input File

IntermediateData

Output File

ProcessingModule

32 of 29July 19-21, 2010


Level-0 Preprocessor

Level-0Downlink

File

l0gen

Level-0File

Implemented by Joel Gales

Current Capabilities:1. Processes a Level-0 downlink file

at CONAE to remove duplicate blocks and sort by time.

To be done:1. Final data quality checks.

33 of 29July 19-21, 2010


Level-0 to 1A

SAC-DTelemetry

SAC-DEphemeris

Data

Level-0 File

l1agen

Level-1AFiles


Current Capabilities:1. Processes a Level-0 multi-orbit

file to multiple Level-1A orbit files with overlap.

2. Inputs SAC-D ephemeris and telemetry from separate files.

3. Unpacks Aquarius science data.4. Converts Aquarius telemetry

to engineering units. 5. Generates HDF5 L1A files.

To be done:1. Implement actual SAC-D

telemetry input file formats when these are known.

34 of 29July 19-21, 2010


Level-1A Merge

l1amerge

Level-1AProduct


Current Capabilities:1. Merges multiple Level-1A files

for the same orbit from successive downlinks.

To be done:1. Data quality checks to keep only

“best” data.

Level-1A Files

35 of 29July 19-21, 2010


Level-2 to 3 Binning

Level-2 Products

l2bin

Level-3Binned Beam

Product

Implemented by Joel Gales based on current OBPG binning software

Current Capabilities:1. Processes multiple Level-2

products (e.g., for 1 week).2. Average samples for each beam

in 1 degree bins. 3. Outputs a Level-3 binned

product per beam.

To be done:1. Add flag exclusion rules.

36 of 29July 19-21, 2010


Level-2 to 3 Smoothing

Level-2 Products

l2smooth

Implemented by Joel Gales based on algorithm from Jonathan Lilly


products (e.g., for 1 week).2. Generates smoothed values in 1

degree bins. 3. Outputs a Level-3 smoothed

product.

To be done: 1. Additional smoothing

algorithms or options.2. Add flag exclusion rules.

Level-3Smoothed

Product

37 of 29July 19-21, 2010


Level-3 Binning

Level-3Binned Products

l3bin

Level-3BinnedProduct



binned products.2. Averages samples in common

bins.3. Outputs a single Level-3 binned

product.

38 of 29July 19-21, 2010


Level-3 Mapping

Level-3Binned Product

l3bin

Level-3MappedProduct


Current Capabilities:1. Reads a Level-3 binned product. 2. Outputs a Level-3 mapped (lat-

lon gridded) product.

39 of 29July 19-21, 2010


OBPG Computing Facility

NASA Goddard Space Flight CenterGreenbelt, Maryland

Server location: Building 28 Room W220

- 900 square feet dedicated to the project

- Raised computer floor with under-floor A/C

- Primary and backup A/C units

- 80 KVA Powerware UPS unit with dual 50 KVA PDUs, additional 5 KVA rack-mounted UPS units

- Connections to GSFC high speed networks: SEN

40 of 29July 19-21, 2010


OBPG System Hardware

Processing Cluster46 processing nodes 15 TB

4 storage nodes 10.9 TB

Ingest Servers2 SeaSpace workstations 78

GB1 storage node 5.1 TB

Distribution Servers (ftp)

8 storage nodes 49.3 TB1 server 250GB

Distribution and Storage Servers (web)

Production: 3 processing nodes75 storage nodes 1.03 PB

Testing Cluster

Network Support Servers

Backup Servers2 storage nodes 19.2 TB

Extreme NetworksBlack Diamond 8810

Gigabit Ethernet switch480 ports

Cal/Val & QC Systems

Mission Operations Systems

Development Servers2 superstore nodes 10 TB

User Desktops

Subversion CM Servers2 superstore nodes 586 GB

Database Servers2 superstore nodes 16.4 TB

AQOPS Servers (web)Production: 2 processing nodes

41 of 29July 19-21, 2010


Aquarius Backup Strategy

• Data• On-site

• Downlinks, L0, L1a data files• primary copy on RAID6 storage node• mirror copy on separate RAID6 storage node, at file creation

• Science Products• primary copy on RAID6 storage node• mirror copy if desired, or regenerated from L1a

• Off-site• Downlinks: stored at CONAE• L1A archived at PO.DAAC

• Source Code• On-site

• primary copy on subversion server, RAID6• mirror copy on backup Subversion server, RAID6, nightly mirror

• Off-site• Subversion data copied to external disk, taken off-site every 1 month• Multiple copies, given to Project Manager, SE, Processing Manager

• Other• On-site

• AQOPS, Forum: database mirrored to backup server nightly• Telemetry Viewer, other: image backups periodically, manual

• Off-site• AQOPS, Forum: databases included in source code off-line backups• Telemetry Viewer, other: image backups stored off-line like source code

42 of 29July 19-21, 2010


IT Security Plan

• ADPS and ACCS: covered under the same plan as other Ocean Biology Processing Group (OBPG) systems.

• NASA IT Security Plan Identification– System name: Sciences and Exploration Directorate (SED) Multi-

Program/Project (MPP) IT Science Systems– System Abbreviation: SED MPP– System Unique Identifier: CD-014-L-GSF-6004– Information System Type: General Support System– Information System Security Categorization: Low (transitioning to

medium within the year)– Information System Operational Status: Operational

• Effective 5/31/2007. Passed Certification & Accreditation in Summer 2007 - in process of being upgraded

• Plan designated Sensitive But Unclassified by NASA

• Implementation questions: addressed off-line

43 of 29July 19-21, 2010


Ground System Staffing

NASA Management - Gene Feldman: Oversight of the overall effort, communication/coordination with other NASA organizations and centers and CONAE; oversight of science support, algorithm integration, QC, validation and in situ data support.

Contractor Management - Fred Patt: Oversight of contract support staff, including hiring, tasking, review of deliverables and schedules; ADPS interface definition and product format specification.

Mission Operations - Susie Kennison: Technical lead for instrument operations and commanding support; interface to instrument engineers and CONAE mission operations.

Data Systems Engineering - John Wilding: Technical lead for the data system integration effort; overall system design, implementation and testing.

Software Engineering – Joel Gales: Technical lead for the level conversion / product generation software, including development of the Level 0-to-1 software and integration/packaging of the science (Level 2 and 3) processing software to be provided by the algorithm developers.

Data Systems Support - Dan Knowles: Integrate the product generation software into the existing automated processing system, develop ingest modules, develop database tables for archive products, develop schedules and recipes for data acquisition, production and migration.

Systems Administration - Paul Smith: Specify and acquire new processing and data storage hardware, integrate into existing data processing facility, verify/upgrade network capability for external data transfers.

Quality Control and Validation - Liang Hong: Working with the Science Team, develop methodologies, tools, procedures and reports for operational QC; specify data and develop algorithms and tools for data and science algorithm validation.

In Situ Data Support - Jeremy Werdell: Work closely with the Aquarius Validation Data System (AVDS) to develop methods and tools for data analysis and quality control, building upon the existing SeaWiFS Bio-optical Archive and Storage System (SeaBASS).

Archive and Distribution - Norman Kuring: Incorporate Aquarius product browse, search, order and distribution into existing web-based Ocean Color capability and work with JPL PO.DAAC regarding “institutional” archive support requirements.