# Presentation: 445059

## EOS MLS Status Report

**Joe Waters**
**Aura Science Team Meeting**
**Pasadena, California**
**2 March 2005**

## MLS Status Summary 

**Have been in full-up science mode since 13 August 2004**
**No significant problems have been encountered**
**All key measurements have been demonstrated **
**Now producing data (Version 1.5) for public release  **
**Uses algorithm updates based on inspection of results from ****the first few months of operation **
**Data are available on AVDC and DAAC **
**MLS ‘data quality document’ is **_**required reading**_** for data users **
**document is distributed with the data, and available from MLS team**
**describes quality and known artifacts for each data product **
**Users of these initial data should work closely with MLS team**
**Validation activities are well underway **
**and some science**

**MLS Status Summary **

## Milestones since 15 July 04 launch 

**Instrument ‘first light’ ...................................................****	****24 Jul 04**
**Begin L1 radiance processing at SCF and SIPS  ......****	****25 Jul 04**
**Begin Level 2 (retrievals) processing at SCF ............****	****27 Jul 04****	**
**First full day of instrument operation in orbit  ..........****	**** 3 Aug 04**
**Begin full-up science mode with instrument .............****	****13 Aug 04**
**Begin Level 2 production processing at SIPS ...........****	****30 Aug 04**
**Begin processing with updated (V1.50) algorithms ..****	****8 Jan 05**
**Fix error in V1.50 software, start using V1.51 ...........****	****28 Jan 05**
**Begin putting data on AVDC and DAAC ....................****	****15 Feb 05**

**Milestones since 15 July 04 launch **

## ‘First Light’ Spectra Examples individual 1/6 s measurement example from each MLS radiometer (120 such measurements, and calibration, on each limb scan)vertical axis is radiance in Kelvin; horizontal is delta frequency in MHzvertical extents of bars give ±1σ noise, horizontal give channel resolution 

**2.5 THz OH spectra**** **** **
**(one of four 2.5 THz OH lines measured by MLS)**
**24 July 2004 data**
**Calibration and spectra ****by Herb Pickett **

**GHz spectra****   ****27 July 2004 data:  Calibration and spectra by Robert Jarnot **

## First full day of MLS operation in orbit (3 August 2004, retrievals using pre-launch algorithms)

**N****2****O**

**Temperature**

**HNO****3**

**H****2****O**

**HCl**

**ClO**

**O****3**

**white contours are vortex-edge potential vorticity**

**We see features expected in Antarctic vortex at this time of year**

**For polar processing studies really nice to get temperature, N****2****O and HCl that we didn’t have on UARS MLS**
**Also, really nice **_**not**_** to have ‘yaw gaps’ that were present on UARS**

**low temperatures**
**descent (N****2****O)**
**depleted HNO****3****, H****2****O and HCl**
**enhanced ClO (in sunlight)**
**start of O****3**** loss**

## MLS Instrument Operation Status Summary

| S | M | T | W |  | T | F |  | S |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 4 | 5 | 6 | 7 |  | 8 | 9 |  | 10 |  |
| 11 | 12 | 13 | 14 |  |  |  |  |  |  |
| Aura launch and MLS instrument activation |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  | 13 |  | 14 |
| 15 | 16 | 17 |  | 18 | 19 |  | 20 |  | 21 |
| 22 | 23 | 24 |  | 25 | 26 |  | 27 |  | 28 |
| 29 | 30 | 31 |  | 1 | 2 |  | 3 |  | 4 |
| 5 | 6 | 7 |  | 8 | 9 |  | 10 |  | 11 |
| 12 | 13 | 14 |  | 15 | 16 |  | 17 |  | 18 |
| 19 | 20 | 21 |  | 22 | 23 |  | 24 |  | 25 |
| 26 | 27 | 28 |  | 29 | 30 |  | 1 |  | 2 |
| 3 | 4 | 5 |  | 6 | 7 |  | 8 |  | 9 |
| 10 | 11 | 12 |  | 13 | 14 |  | 15 |  | 16 |
| 17 | 18 | 19 |  | 20 | 21 |  | 22 |  | 23 |
| 24 | 25 | 26 |  | 27 | 28 |  | 29 |  | 30 |

**MLS Instrument Operation Status Summary**

**Atmospheric  data production metric **

| 100% |
| --- |
| 99% to < 100% |
| 90% to < 99% |
| < 90% (due to plan or S/C issue) |
| < 90% (due to MLS ops issue) |

**(fraction of all possible data for each 24-hour period that is useful for atmospheric measurements)**

| S | M | T | W | T | F | S |
| --- | --- | --- | --- | --- | --- | --- |
| 31 | 1 | 2 | 3 | 4 | 5 | 6 |
| 7 | 8 | 9 | 10 | 11 | 12 | 13 |
| 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 21 | 22 | 23 | 24 | 25 | 26 | 27 |
| 28 | 29 | 30 | 1 | 2 | 3 | 4 |
| 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| 19 | 20 | 21 | 22 | 23 | 24 | 25 |
| 26 | 27 | 28 | 29 | 30 | 31 | 1 |
| 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| 23 | 24 | 25 | 26 | 27 | 28 | 29 |
| 30 | 31 | 1 | 2 | 3 | 4 | 5 |
| 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 13 | 14 | 15 | 16 | 17 | 18 | 19 |
| 20 | 21 | 22 | 23 | 24 | 25 | 26 |

## MLS Instrument Performance Summary

**sensitivity requirements are well met**
**radiometer system noise stability ****of 0.2% or better demonstrated**
**moon scans have confirmed pre-launch ****FOV boresight pointing accuracy of 0.003****o**** ****(corresponds to 150 meters at limb)**
**indications are that pre-launch absolute ****calibration accuracy of few % achieved**
**Calibration and performance are ****documented in MLS IEEE papers**
**Stringent performance ****test is shown at right**
**Weak upper trop CO ****signature measured in ****presence of nearby ****strong O****3**** lines**

**MLS Instrument Performance Summary**

- from Filipiak et al., GRL, submitted 2005

**150**
**100**
**50**
**1.0**
**0.5**
**0.0**

**         ****-600  -400  -200    0     200    400   600 ****        frequency from line center / MHz**

**region of enhanced CO over south Asia****(****blue**** and ****green**** are calculated signatures ****for upper trop CO: ****green for retrieved geophysical parameters****)**

**‘****clean’ Pacific regions **

## MLS Level 1 Data Processing Status

| S | M | T | W | T | F | S |
| --- | --- | --- | --- | --- | --- | --- |
| 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 11 | 12 | 13 | 14 |  |  |  |
| Aura launch and MLS instrument activation |  |  |  |  |  |  |
|  |  |  |  |  | 13 | 14 |
| 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| 22 | 23 | 24 | 25 | 26 | 27 | 28 |
| 29 | 30 | 31 | 1 | 2 | 3 | 4 |
| 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| 19 | 20 | 21 | 22 | 23 | 24 | 25 |
| 26 | 27 | 28 | 29 | 30 | 1 | 2 |
| 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| 24 | 25 | 26 | 27 | 28 | 29 | 30 |

**MLS Level 1 Data Processing Status**

| S |  | M | T | W | T | F | S |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 31 |  | 1 | 2 | 3 | 4 | 5 | 6 |
| 7 | 8 |  | 9 | 10 | 11 | 12 | 13 |
| 14 | 15 |  | 16 | 17 | 18 | 19 | 20 |
| 21 | 22 |  | 23 | 24 | 25 | 26 | 27 |
| 28 | 29 |  | 30 | 1 | 2 | 3 | 4 |
| 5 | 6 |  | 7 | 8 | 9 | 10 | 11 |
| 12 | 13 |  | 14 | 15 | 16 | 17 | 18 |
| 19 | 20 |  | 21 | 22 | 23 | 24 | 25 |
| 26 | 27 |  | 28 | 29 | 30 | 31 | 1 |
| 2 | 3 |  | 4 | 5 | 6 | 7 | 8 |
| 9 | 10 |  | 11 | 12 | 13 | 14 | 15 |
| 16 | 17 |  | 18 | 19 | 20 | 21 | 22 |
| 23 | 24 |  | 25 | 26 | 27 | 28 | 29 |
| 30 | 31 |  | 1 | 2 | 3 | 4 | 5 |
| 6 | 7 |  | 8 | 9 | 10 | 11 | 12 |
| 13 | 14 |  | 15 | 16 | 17 | 18 | 19 |
| 20 | 21 |  | 22 | 23 | 24 | 25 | 26 |

**L0 data processed to L1**

**data versions to date**
**‘****prel.’ is ‘preliminary’ version from first processing following instrument activation**
**V1.50 is improvement over ‘preliminary’, but error was found in high-resolution spectrometer radiance uncertainties**
**‘****V1.51’ corrects error in ‘V1.50’ and is the MLS data version first being made ****publicly available**

|  | latest version |  |  |
| --- | --- | --- | --- |
| 100% (by SIPS) | prel. | V1.50 | V1.51 |

**Blue borders indicate ****‘validation days’ given processing priority**

## MLS Level 2 Data Processing Status

| S | M | T |  | W |  | T | F |  | S |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 4 | 5 | 6 |  | 7 |  | 8 | 9 |  | 10 |
| 11 | 12 | 13 |  | 14 |  |  |  |  |  |
| Aura launch and MLS instrument activation |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  |  | 13 | 14 |
| 15 | 16 |  | 17 |  | 18 | 19 |  | 20 | 21 |
| 22 | 23 |  | 24 |  | 25 | 26 |  | 27 | 28 |
| 29 | 30 |  | 31 |  | 1 | 2 |  | 3 | 4 |
| 5 | 6 |  | 7 |  | 8 | 9 |  | 10 | 11 |
| 12 | 13 |  | 14 |  | 15 | 16 |  | 17 | 18 |
| 19 | 20 |  | 21 |  | 22 | 23 |  | 24 | 25 |
| 26 | 27 |  | 28 |  | 29 | 30 |  | 1 | 2 |
| 3 | 4 |  | 5 |  | 6 | 7 |  | 8 | 9 |
| 10 | 11 |  | 12 |  | 13 | 14 |  | 15 | 16 |
| 17 | 18 |  | 19 |  | 20 | 21 |  | 22 | 23 |
| 24 | 25 |  | 26 |  | 27 | 28 |  | 29 | 30 |

**MLS Level 2 Data Processing Status**

| S | M | T | W | T | F | S |
| --- | --- | --- | --- | --- | --- | --- |
| 31 | 1 | 2 | 3 | 4 | 5 | 6 |
| 7 | 8 | 9 | 10 | 11 | 12 | 13 |
| 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 21 | 22 | 23 | 24 | 25 | 26 | 27 |
| 28 | 29 | 30 | 1 | 2 | 3 | 4 |
| 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| 19 | 20 | 21 | 22 | 23 | 24 | 25 |
| 26 | 27 | 28 | 29 | 30 | 31 | 1 |
| 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| 23 | 24 | 25 | 26 | 27 | 28 | 29 |
| 30 | 31 | 1 | 2 | 3 | 4 | 5 |
| 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 13 | 14 | 15 | 16 | 17 | 18 | 19 |
| 20 | 21 | 22 | 23 | 24 | 25 | 26 |

**L1 data processed to L2****(latest version )**

**notes**
**V1.50 and V1.51 use same L2 algorithms, but V1.50 has metadata error and must be reprocessed**
**V1.51 being made publicly available**
**MLS SIPS sized & funded to process 60% of L1 data to L2 for first year of ops**
**achieved 62% to date**
**MLS SIPS is now being upgraded to process 100% of new data to L2 and to do reprocessing**

| 100% (by SIPS) | prel. | V1.50 | V1.51 |
| --- | --- | --- | --- |
| 100% (by SCF) | prel. | V1.50 | V1.51 |

**Blue borders indicate ****‘validation days’ given processing priority**

## MLS Data Validation (1)

**in plots at right:**
**dots are averages**
**thin lines are extrema**
**shading is ****±1****σ**
**diamonds are estimated precision**

**First steps in MLS data validation are routine inspections of daily radiances and residuals for each spectral band**
**and (when possible) comparison of data products with ‘climatology’**
**Example here of radiance/residual inspection for one band & one day**

**horizontal axis in each panel is channel number**

## MLS Data Validation (2)

**O****3**** vs latitude at 4 heights**

**OH vs height at 34****o**** N**

**Now comparing MLS data with **_**many**_** other measurements**
**O****3**** (Lucien Froidevaux) and OH (Herb Pickett) examples here**

## MLS Data Validation (3) 

** ****Several MLS data validation talks yesterday**
** ****Additional posters this afternoon **
**MLS scientists responsible for geophysical data products**
**Mark Filipiak .........................****	****CO, upper tropospheric O****3**
**Lucien Froidevaux ...............****	****stratospheric O****3****, HCl, HOCl**
**Nathaniel Livesey ................****	****N****2****O, BrO, CH****3****CN**
**Gloria Manney  .....................****	****dynamical consistency of data**
**Herb Pickett ..........................****	****OH, HO****2**
**Hugh Pumphrey ...................****	****stratospheric H****2****O, HCN**
**Bill Read ................................****	****upper tropospheric H****2****O, volcanic SO****2**
**Michelle Santee ....................****	****HNO****3****, ClO**
**Michael Schwartz .................****	****T, geopotential height, (tangent pressure) **
**Dong Wu ...............................****	****cloud ice**

##       Approximate Useful Vertical Range       Expected for MLS V1.5 Data Productsreminder:  be familiar with ‘data quality document’ before using data

**Dashes indicate that averages are generally needed for useful precision**
**Dots indicate goals that may be demonstrated in V1.5 with further work****(will have some yet wider ranges in V2 (e.g., mesosphere O****3****), planned for ~1 year from now)**
**Day-night differences currently required for BrO, HO****2****, and OH below ~30 km**

**HO****2**

**temper-ature and GPH**

**ClO**

**HCl**

**meso-sphere**

**20**

**40**

**30**

**80**

**10**

**60**

**70**

**0**

**cloud ****ice**

**H****2****O**

**OH**

**BrO**

**ht ****/ km**

**tropo-sphere**

**strato-sphere**

**HCN**

- note scale change at 50 km

**CO**

**50**

**N****2****O**

**HNO****3**

**O****3**

**HOCl**

## Some MLS Science Results

**Papers submitted to GRL  **(preprints at http://mls.jpl.nasa.gov)
**Michelle Santee, et al., ‘Polar processing and development of the 2004 Antarctic ozone hole: First results from Aura MLS’****(write-up of Michelle’s paper given at Dec 04 AGU)**
**Gloria Manney, et al., ‘EOS Microwave Limb Sounder Observations of the Antarctic Polar Vortex Breakup in 2004’  ****(Gloria’s talk on this at 11:15 am tomorrow)**
**Mark Filipiak, et al., ‘Carbon Monoxide Measured by the EOS Microwave Limb Sounder on Aura:  First Results’****(includes validation of enhanced upper trop O****3**** feature observed by MLS)**
**Qinbin Li, et al., ‘Trapping of Asian pollution by the Tibetan anticyclone:  ****A global CTM simulation compared with EOS MLS observations’ ****(Qinbin’s talk on this at 2:30 pm tomorrow)**
**Cory Davis, et al., ‘Cirrus Induced Polarization in MLS Radiances’****(measurement of preferred alignment of cirrus particles)**
**Additional talks and posters at this meeting **
**Detected SO****2**** and HCl injected into lower stratosphere from ****27 January 2005 New Guinea Manam Volcano (Bill Read)**

## MLS is closely watching the Arctic 

**MLS is closely watching the Arctic **

**time-series of measurements on N****2****O surfaces, averaged over equivalent latitude bands poleward of ~50****o****, are shown here****see poster by Gloria Manney, Michelle Santee, et al.****(with more data in late February than shown here)**