# Presentation: 906485

## OMI Status Report

**OMI Status Report**

**Pieternel Levelt**
**OMI Principal Investigator**
**Aura ST Meeting**
**September 2006**

**Notes:**
Hartelijk welkom op het KNMI !

En welkom bij deze voordracht over “de zonlaag bekeken vanuit de ruimte”

Op deze foto genomen vanuit de Space Shuttle ziet u de aarde als een mooie bol
	met een oppervlakte van zee en land
	omringt door een dunne schil van gas 
	met daarin enkele wolken en enkele wazige gebieden.

Dit is onze aarde en dit is onze atmosfeer en hier doen wij metingen aan vanuit de ruimte. 

## International OMI Team

- International OMI Science team
- PI: 	P.F. Levelt
- dep.PI: 	P. Veefkind
- co-PI	J.Tamminen
- US ST Leader: 	P.K. Bhartia
- .... And about 60 - 80 scientists
- Industry
- Dutch: DS, TNO-TPD, SRON
- Finnish: VTT, Patria
- USA: Northrop GES USA
- Dutch, Finnish and US  Space Agencies
- NIVR, FMI and NASA

## Thanks to OMI Science Team !

## Instrument and Operations

**Instrument**
- Instrument is thermally stable
- no signs of optical degradation
- CCD degradation will be (mostly) corrected for in next reprocessing set
- OMI had a Folding Mirror Anomaly on Feb 28, 2006 (see below)
**Operations**
- OMI operations is almost flawless (only 4 days of data loss)
_**FMM anomaly**_ was investigated and is off the table. OMI mechanisms will be operated differently (currently implemented). The anomaly resulted in:
- 3 days of data loss (February 28, March 1 & 2 )
- March 3 – June 12: Science (Earth and dark) data taken, no cal.meas.
- June 12 onward: nominal operations
- The OMI instrument settings have been optimized for the ozone hole season to prevent saturation in the UV
- An extra calibration meas. was implemented to determine the non-linearity of the CCD.

## In-flight calibration and level 1b

**In-flight Calibration and level 1b**
- Extensive OMI in-flight calibration program
- Calibration data gap :March 3 - June 12 (FMM anomaly)
- Level 1b provisional released:  September 2006 !
**Striping correction and improved straylight correction ****for ECS-3 reprocessing (level 1b 0.9.18 and OPF 32):**
- Updated Level 1b software (v 0.9.18) (straylight)
- New type Calibration key data file : time-dependent! (TDOPF (OPF32))
- include  time dependent corrections for background and RTS (striping)
- straylight and radiometric corrections
- Level 1b (v 09.18) and the time-dependent OPF form the basis for our reprocessing effort starting end of January 2007.
- Level 1b product planned public release is planned for  the ECS 3 collection (currently Jan. 2007) -gradual release of data.

## L1b software (v o.9.18): end of September
L2 PGE’s : December 22, 2006
	run new L1b software in test stream, evaluate impact on L2 data and update L2 PGE’s (if needed) : Oct & Nov: evaluation time for level 2 developers!
TDOPF : mid January 2007
DAAC/DISC:
	prepare for ECS2 to ECS3 transition (S4PA!!), including end-to-end testing: early nov06
	Note:
	- L0 -> 1b data will be reprocessed (with TDOPF) for ECS3 till reprocessing catches up with forward processing (without TDOPF) for ECS2- turn-off ingest of ECS2 data: date is TBD

Only when all these milestones are met reprocessing the OMI L0 -> 1b data can start end of January 2007

- L2 PGE’s : December 22, 2006
- 	run new L1b software in test stream, evaluate impact on L2 data and update L2 PGE’s (if needed) : Oct & Nov: evaluation time for level 2 developers!
- TDOPF : mid January 2007
- DAAC/DISC:
- 	prepare for ECS2 to ECS3 transition (S4PA!!), including end-to-end testing: early nov06
- 	***Note:***
- 	- L0 -> 1b data will be reprocessed (with TDOPF) for ECS3 till reprocessing catches up with forward processing (without TDOPF) for ECS2- turn-off ingest of ECS2 data: date is TBD
**Only when all these milestones are met reprocessing the OMI L0 -> 1b data can start end of January 2007**

**Ground segment (1)****Reprocessing (ECS 3 collection)**

## Ground segment (2)

**Ground system**
- SIPS and ODPS performance is as expected
- NRT system O3 and NO2 since January 2006:O3 data to NOAA and ECMWF; NO2 at KNMI website
- VFD system is operational since March 2006
- Reprocessing for ECS collection 3 will start in Jan.2007

- NRT images OMI NO2 KNMI TEMIS and OMI websites; van der A, Boersma, Eskes, Veefkind

- VFD images from the VFD site in Finland: Tanskanen et al.
- http://omivfd.fmi.fi/index_eng.html

- UV index		Total Ozone	       Erythemal Dose

- June 18 (Sunday)

- June 19 (Monday)

## Level 2 Algorithm Status (provisional)

- All products are provisionally released, except for O3 profile
- Ozone profile provisionally release is planned for October.
- Multi-wavelength aerosol product (OMAERO) provisional release is planned for November.

***Veefkind, Veihelman***
***KNMI***

## Level 2 Algorithm Status (public)

**Level 2 Algorithm Status (public)**

- O2-O2 Cloud and Ozone DOAS products (v1.0.1) have been publicly released in June
- NO2 product has been publicly released in September
- UV Aerosol and UV-B will be publicly released this month
- HCHO, BrO and SO2 public release is planned in October
- OClO public released in November
- O3 profile and level 1b will be publicly released after reprocessing (ECS-3)

***Courtesy De Haan***
***Presentation: de Haan & Veihelman, Thursday***

## Status of OMI Data Products

| Product | Provisional release | Validated Stage 1 release (Public) | Validation Status |
| --- | --- | --- | --- |
| - Level 1B | Released | February 2007 (ECS-3) |  |
| - Total Column Ozone (TOMS) | Released | Released |  |
| - Total Column Ozone (DOAS) | Released | Released |  |
| - Aerosol1 | Released | September 2006 |  |
| - NO2 total and trop. column  | Released | Released |  |
| - Cloud Height (O2-O2) | Released | Released |  |
| - Cloud Height (Raman) | Released | Released |  |
| - Surface UVB | Released | September 2006 |  |
| - HCHO | Released | October 2006 |  |
| - SO2 | Released | October 2006 |  |
| - BrO | Released | October 2006 |  |
| - OClO | Released | November 2006 |  |
| - O3 Profile  | October  2006 | March 2007 (ECS-3) |  |

## Near-real Time Data Products

**Near-real Time Data Products**

- On _[www.](http://www.temis.nl/)__[temis](http://www.temis.nl/)__[.](http://www.temis.nl/)__[nl](http://www.temis.nl/)_ the following near-real-time information can be found:
- Images of tropospheric NO2
- Images of total column ozone
- Assimilated and forecasted total ozone (data will be released soon!)
- The near-real-data will be put on this site in the coming months.
- O3 data (TOMS and DOAS) are delivered to NOAA and ECMWF
- Serious plans for a NRT SO2 product

## Validation

**Validation: extensive validation program:**
- NASA aircraft campaigns
- ESA/NIVR/KNMI AO ***(Kroon, Thursday)***
- NASA NRA
- Ground based campaigns
- DANDELIONS 1 **& 2**
- SAUNA campaign
**OMI Validation Priorities:**
- NO2 (polluted conditions)
- O3 (polluted conditions and
- high solar zenith angle, snow, clouds)
- Aerosols
- HCHO, SO2 and other trace gases

- OMI TOMS V8 - DOAS v1.0.1
- Total O3 Column

- Total O3 Column Difference [DU]

*<>=  -0.45 DU*
***  **= 11.3 DU*
*  ****  **=  -1.66*

***Kroon (KNMI), ***
***Labow (NASA GSFC)***

***Total ozone: Chiou, Labow, Thursday***

## NO2 – 2nd DANDELIONS Campaign

**2941 - Validation of SCIAMACHY and OMI NO2 and aerosol data using Dutch ground based measurements. Dr. Pieternel F. Levelt, KNMI, De Bilt, The Netherlands **

- KNMI, NASA	OMI, SCIAMACHY RIVM		NO2 lidar,  backscatter lidar, NO2 ground monitorsBIRA-IASB	MAXDOAS, Mini MAXDOASIUP Heidelberg	MAXDOAS (three directions)IUP Bremen	MAXDOAS KNMI 		Mini MAXDOAS, ozone sondes, radio sondes 		TNO		Sun photometers, volatility system, aethalometer,                                  nephelometer, etc.Results of the first campaign yielded, e.g. :NO2 profiles 0-2.5 km by lidar and MAXDOASMAXDOAS system comparisons & accuracy assessments

## OMI Highlights

**2004, 2005 and 2006**** **

## First OMI data delivered to IPCCOMI data used in  WMO Antarctic O3 report, 2005/2006 winter

- Average column ozone pole ward of 63 latitude in the springtime of each hemisphere (March for the NH and October for the SH), in Dobson units, based on data from various satellite instruments as indicated. Data point from the Ozone Monitoring Instrument (OMI) is preliminary.   Figure is updated from Newman et al. (1997)

- IPCC/TEAP Special Report:  Safeguarding the ozone layer and the global climate system: *Issues related to the hydrofluorocarbons and perfluorocarbons, Summary for Policy Makers*, WMO/UNEP, 2005.

**OMI data delivered to IPCC**

## OMI’s view of Katrina

- OMI reflectivity

- OMI cloud pressure:
- O2-O2  DOAS
- Retrieval; senses deeper in cloud than Raman
*Sneep, de Haan, Stammes et al.*

- OMI effective cloud pressure: UV channels sensitive to Raman scattering see through high cirrus to lower water clouds with band structure
*Joanna,Vassilkov et al., GRL, 2006*

***Vasilkov, poster,***
***Monday, Tuesday****** ***

## OMI NO2 Images for April 15, 2004

- OMI NO2 Images for April 15, 2004
*Glaeson , Veefkind et al. , *

- 0

- 20.e15

- molecules/cm2

- Saturday 15 October

- Sunday 16 October

- Monday 17 October

- OMI NRT NO2; Veefkind, Eskes, Boersma. Van der A, KNMI

- Talk by Gleason, Thursday

- Talk by Boersma, Monday

## Aerosol

**19 June 2005**

- Figures: Pepijn Veefkind, KNMI

***Veefkind, Curier, De Leeuw, KNMI and TNO-FEL***

***Torres, NASA GSFC***

**Multiwavelength algorithm**

**UV algorithm**

## CHO-CHO, HCHO, BrO

**CHO-CHO, HCHO, BrO**

- Figure: Thomas Kurosu, Smithsonian Astrophysical Observatory, Boston, USA

***Kurosu and Chance, Harvard***

***Talk by Jacob,***
***Monday***

## Ambrym (Vanuatu) SO2 plumeFeb 20, 2005: aviation control

- Clouds

- Clouds

*Krotkov, Carn, Krueger,**NASA GSFC, *
*University of MAryland*

***Talk by Carn, Friday***

**Notes:**
Signal in OMI data depends on timescale of observation - strong sources show up in single daily images; weaker sources become apparent after time-averaging days or weeks of data. 10 DU in the Ambrym plume - a large amount for a passive plume? Important to keep track of clouds when observing troposphere - can mask SO2 at lower levels. Relatively steady decrease in SO2 concentration away from the vent - suggests fairly steady emissions from volcano? Traceable a long distance (several 100 km?)

## Tropospheric Ozone (scientific product)

***MLS/OMI tropospheric ozone,******Monthly average July and October 2005, ******Ziemke et al., JGR 2006***

***Trop.Ozone cloud slicing method, ***
***Ziemke et al.***

***24 and 28 June 2005***

***Several presentations & posters***
***on trop O3, a.o. Schoeberl Tuesday,***
***Stajner, Friday; Worden, Friday***

## OMI Very-Fast-Delivery has been operational since March 2006

**OMI Very-Fast-Delivery has been operational since March 2006**
- OMI data is received by Direct Broadcast in Sodankylä and is processed immediately after each overpass of the Aura satellite. Distribution plots for total column ozone, UV Index and Erythemal daily dose are published within 30 minutes after the overpass at
**http://omivfd.fmi.fi/index_eng.html**

**Notes:**
this is possible because VFD data is only some 5% of the daily OMI data and a limited number of PGEs are run at Sodankylä

## Ozone Monitoring Instrument Data Access

- Standard products: 		Distributed Active Archive Center
- 					of NASA-GSFC Earth Sciences
- 					http://disc.gsfc.nasa.gov/Aura/OMI
- Near-real-time products(images): http://www.temis.knmi.nl	 				  _[http://www.knmi.](http://www.knmi.nl/omi)__[nl](http://www.knmi.nl/omi)__[/](http://www.knmi.nl/omi)__[omi](http://www.knmi.nl/omi)_
- Very-fast-delivery products:	http://omivfd.fmi.fi/index_eng.html
- For validation:		http://avdc.gsfc.nasa.gov

## Conclusions

- OMI is the first of the new generation space borne spectrometers that enables daily AQ measurements from space
- OMI is operated successfully and works according to expectations
- OMI off-line standard data all public available in 2007
- Reprocessing for ECS 3 starts end of January 2007
- Interest in validation:please contact us!

- OMI NO2, June 13, 2006
- courtesy Pepijn Veefkind, Henk Eskes, Folkert Boersma, Ronald van der A

***www.knmi.nl/omi ****** http://eos-aura.gsfc.nasa.gov/***

- When using public OMI data: contact OMI ST representatives
- And read read-me files !!!

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