# Presentation: 604662

## HIRDLS Validaton Update

**D. Kinnison and J. Gille**
- dkin@ucar.edu
- 303-497-1469

## Pre-Launch HIRDLS Global Mode Sampling Pattern (12-hour period) 

**HIRDLS lat-lon profile locations**
**Temperature on 16 km surface**
**Example 12h global scan-mode **
**Swath width = 6 profiles**
**2 global maps per day @ 5****°**** x 4****°**

**Along track cross-section for orbit plane**
**Central ‘curtain plot’ (1 of 6 in a swath)**
**Temperature (8 - 30 km)**
**Spacing of profiles along track ~230  km for orbit plane and ~460 km outside  **

**Additional profile inserted in global mode scan along orbit track**
**Doubles resolution along orbit plane**

**Satellite**
**Movement**

**HIRDLS swath**

- Courtesy of Alyn Lambert

## HIRDLS Reduced Aperture Measurements 

- Aura Orbit Path

- x

- x

- x

- x

- HIRDLS will be measuring at -47 degrees to the orbit track
- The HIRDLS tangent points in this schematic are the red x’s.
- MLS tangent points will be along the orbit path.

- Azimuth = -47°

## HIRDLS Daily Coverage  ( ≈ 7000 profiles; ≈ 65km spacing along orbit track)

- 64S

- 80N

## Comparison of HIRDLS tangent locations to MLS 

- HIRDLS Azimuth = -47° from the orbit plane

- Day

- Night

- During the day part of the orbit, HIRDLS is trailing MLS by one orbit. During night the coincidence is much better and HIRDLS leads MLS by one orbit.

## Comparison of HIRDLS tangent locations to TES 

**Comparison of ****HIRDLS**** tangent locations to ****TES**** **

- HIRDLS Azimuth = -47° from the orbit plane

- Day

- Night

## Science mode since 21 January 2005. 

- T, O3, H2O, Aerosols, NO2, CFC-12

- More difficult species to retrieve:

- CH4, N2O, N2O5, ClONO2, HNO3, CFC-11

- Science mode since 21 January 2005.

## HIRDLS FYO5 Validation Needs.

**Temperature**
**GMAO Data**
**Radiance validation **
**Incorporate in retrieval procedure (LOS gradients)**
**Aura MLS; GPS; TIMED-SABER**
**PAVE (McGee AROTAL Lidar; MTP)**

## Use GMAO (T, O3, and H2O) for loss of Cross Track LOS gradients information

## HIRDLS FYO5 Validation Needs.

**Temperature**
**GMAO Data**
**Radiance validation **
**Incorporate in retrieval procedure (LOS gradients)**
**Aura MLS; GPS; TIMED-SABER**
**PAVE (McGee AROTAL Lidar; MTP)**

## PAVE Flight on 7 February 2005

## PAVE Flight on 7 February 2005

## PAVE Flight on 7 February 2005

## HIRDLS FYO5 Validation Needs.

**Ozone**
**Aura MLS; with Trajectory modeling.**
**POAMIII (NH), SAGEIII,II, and HALOE**
**PAVE (Browell, McGee Lidars, and Avery *****in situ*****)**
**Ozone sondes**
**H****2****O vapor**
**Aura MLS**
**POAMIII (NH), SAGEIII, and HALOE**
**H****2****O sondes**
**TCSP?**
**NO****2**
**POAMIII (NH),  HALOE (modeling to compare local time coincidence)**
**OSIRIS and MIPAS (campaign mode), ACE.**
**Heavy lift balloons (Sept 2005)**

## HIRDLS FYO5 Validation Needs.

**CFC-12**
**MIPAS and ACE**
**AVE (WAS or PANTHER)**
**Heavy lift Balloons (Sept 2005)**
**Aerosol, Cirrus (and Cloud Height)**
**Lose SH PSCs; cold NH conditions needed.**
**PAVE (Browell, McGee lidars)**
**Ground-based lidars (NDSC sites)**
**AVE (size distributions; composition)**
**MODIS (thin Cirrus channel at 1.38um)**
**Other HIRDLS Products...**
**N****2****O, HNO****3**** ****	****=> Aura - MLS **
**CH****4**** ****	****	****=> HALOE, Aura-TES **
**CFC-11 ****	****=> (similar to CFC-12)**
**ClONO****2****, N****2****O****5**** => MIPAS, ACE, Heavy lift balloons.**

##     The End