Download presentation
Presentation is loading. Please wait.
1
Bureau of Meteorology GOES-9 AMVs Generation and Assimilation Bureau of Meteorology GOES-9 AMVs Generation and Assimilation
2
GMS ‑ 5 channels GMS ‑ 5 channels ChannelWavelength IDRangeResolution VIS0.5 - 1.0 µm1.25 km IR110.2 - 11.4 µm5 km IR210.9 - 12.2 µm5 km IR36.7 - 7.2 µm5 km
6
GOES-9 IMAGER
7
Imager Instrument Characteristics (GOES I-M) Channel number: 1 (Visible)2 (Shortwave)3 (Moisture)4 (IR 1)5 (IR 2) Wavelength range (um) 0.55 - 0.753.80 - 4.006.50 - 7.0010.20 - 11.2011.50 - 12.50 Instantaneo us Geographic Field of View (IGFOV) at nadir 1 km4 km8 km4 km Radiometric calibration Space and 290 K infrared internal backbody Calibration frequency Space: 2.2 sec (full disc), 9.2 or 36.6 sec (sector/area) Infrared: 30 minutes typical System absolute accuracy IR channels: less than or equal to 1 K Visible channel: 5% of maximum scene irradiance Imaging rateFull earth disc, less than or equal to 26 minutes
10
TRANSITION PLAN FROM GMS-5 TO MTSAT/EO-3 Eo-3/GIFTS GOES-9
11
ATMOSPHERIC MOTION VECTORS Image Navigation Target Selection Target Tracking Height Assignment Quality Control and Error Estimation
12
Bureau of Meteorology GOES-9 Ch.4 AMVs Features tracked in Ch.4 images Height assignment High lvl using Ch.4/Ch.3, low lvl Ch.4 cld base. Assimilation RT in LAPS375 (June 2003 – 30 cases). Bureau of Meteorology GOES-9 Ch.4 AMVs Features tracked in Ch.4 images Height assignment High lvl using Ch.4/Ch.3, low lvl Ch.4 cld base. Assimilation RT in LAPS375 (June 2003 – 30 cases).
15
Table 1 Real time schedule for GOES ‑ 9 Atmospheric Motion Vectors at the Bureau of MeteorologySub ‑ satellite image resolution, frequency and time of wind extraction and separations of the image triplets used for wind generation (ΔT) are indicated. Wind TypeResolutionFrequency-Times (UTC)Triplet (ΔT) Real Time IR 4 km 6 ‑ hourly – 05, 11, 17,23 36 minutes Real Time IR (hourly)4 kmHourly 00, 01, 02,.., 23 1 hour
22
Table 1 Mean Magnitude of Vector Difference (MMVD) between GOES ‑ 9 AMVs and radiosondes winds within 150 km in the Australian Region for 9 June to 30 June 2003 GOES ‑ 9 No. ObsMMVD (ms -1 ) Low 950 – 700 hPa 431 3.64 Middle 699 – 400 hPa 82 4.00 High 399 – 150 hPa1759 4.58
23
Quality Control Oper1 (ERR) Correlation between images U acceleration V acceleration U deviation from first guess V deviation from first guess Cloud height check
24
Quality Indicator (QI) Direction consistency (pair) Speed consistency (pair) Vector consistency (pair) Spatial Consistency Forecast Consistency QI = ∑w i.QV i /∑w i
25
EE provides RMS Error (RMS) Estimated from U acceleration V acceleration U deviation from first guess V deviation from first guess Shear Speed…
26
Recursive Filter Flag (RFF : 0 – 100) Determined by final fit of vector to recursive filter analysis
33
NASA NOAA Navy and BoM Partnership GIFTS/IOMI Enables Improved Global Weather Prediction Inter-Agency/International Cooperation Bureau of Meteorology AustraliaDepartment of Commerce/NOAADoD/Space Test Program Data to Naval Centers/ Fleet Demo Data to Naval Centers/ Fleet Demo Australian Ground Station & Data Processing Center Australian Ground Station & Data Processing Center Data to NOAA Centers Data to NOAA Centers Conus “2” Conus “1” Indian Ocean “3”
34
Global Disk Imaging: 422 Steps Spectral Resolution: 36cm -1 Sounding Regional: 144 Steps Spectral Resolution: 0.6cm -1 Low Noise Sounding: 36 Steps Spectral Resolution: 0.6cm -1 Global Disk Sounding: 360 Steps Spectral Resolution: 18cm -1 GIFTS Allows The Trade of Coverage & Spectral Resolution < 1 Hr < 1/2 Hr (imagery < 5 min) < 1/2 Hr < 10 Min
35
NAST-I Demonstration of GIFTS Water Vapor Feature Sensitivity 300 Mb500 Mb850 Mb CART-Site
36
The business of looking down is looking up
Similar presentations
© 2024 SlidePlayer.com Inc.
All rights reserved.