1. Satellite Reconnaissance Requirements
Joint Typhoon
Warning Center
TDO
Satellite Reconnaissance Requirements

2. TDO Sat Recon Reqmt’s Purpose of TC Satellite Reconnaissance
Reconnaissance imagery requirements
Use of TC fixes in the warning process
Ways to improve fix usefulness

3. Purpose of TC Sat Recon
To assist the Typhoon Duty Officer in determining the position and estimated intensity of the tropical cyclone at a point in time

4. Recon Imagery Requirements
Imagery used in support of JTWC warnings must:
Have sufficient resolution to discern the important meteorological features
</= 1.5km visible
</= 5 km infrared
</= 15 km microwave
Be precisely geo-navigated (each pixel tied to a specific lat/lon point relative to the earth’s surface) to provide accurate position information

5. Use in the Warning Process
The TDO has the following order of precedence:
Fixes within the warning window
1 hour before to 1/2 hour after warning valid time
What does this mean EXACTLY?
For a 00Z warning, use imagery from 23Z to 0030Z
For a 06Z warning, use imagery from 05Z to 0630Z
For a 12Z warning, use imagery from 11Z to 1230Z
For a 18Z warning, use imagery from 17Z to 1830Z

6. Use in the Warning Process
TDO has the following order of precedence (continued)
NOTE: the imagery must be processed and available (in SDHS or SIDAS) for your fix in time to complete and transmit the fix NLT 30 minutes later
What does this mean EXACTLY?
For a 00Z warning, send fix NLT 0100Z
For a 06Z warning, send fix NLT 0700Z
For a 12Z warning, send fix NLT 1300Z
For a 18Z warning, send fix NLT 1900Z

7. Use in the Warning Process
TDO has the following order of precedence (continued)
Platform desirability (whether in or out of warning window):
DMSP high-res visible/infrared
GMS-5
METEOSAT-5/7
NOAA
All other METSAT sources (TRMM, etc)
Fixes outside the warning window

8. Use in the warning process, continued
Feeds in to
Objective best track
Synthetic vortex (bogus) insertion
Numerical model guidance (persistence)
Current warning position and intensity

12. Ways to improve fix usefulness to TDO
Timeliness (inside warning window)
Remarks, remarks, remarks
0927
TPPS10 PGTW
A. TROPICAL STORM IVAN (11W)
B. 20/0830Z
C. 11.2S/4
D E/5
E. SIX/SATELLITE
F. T2.5/2.5/D1.0/24HRS (20/0530Z)
G. IR/EIR/ LLCC
38A/ PBO SBC/ANMTN.
MILD-MANNERED CALVIN
0927
TPPS10 PGTW
A. TROPICAL STORM IVAN (11W)
B. 20/0830Z
C. 11.2S/4
D E/5
E. SIX/SATELLITE
F. T2.5/2.5/D1.0/24HRS (20/0530Z)
G. IR/EIR/ LLCC
38A/ PBO SBC/ANMTN. SBC VERY LOOSE.
OUTFLOW FAIR ALQDS. SYSTEM BCMG MORE
ORGANIZED AS OUTFLOW IMPROVES. AMOUNT
OF DEEP CNVCTN INCRSG AND CLOUD TOP TEMPS
CONT TO COOL.
STUPENDOUS MAN

13. Ways to improve fix usefulness to TDO
Minimum Requirements:
(1) Describe the basis for
your position.
(2) Describe/Explain Final T
number determination.
Explain any major difficulties,
but omit minor side-lights.
“Not enough can be said
about brevity”
Remarks
0927
TPPS10 PGTW
A. TROPICAL STORM IVAN (11W)
B. 20/0830Z
C. 11.2S/4
D E/5
E. SIX/SATELLITE
F. T2.5/2.5/D1.0/24HRS (20/0830Z)
G. IR/EIR/ LLCC
38A/ PBO SBC/ANMTN. SBC VERY LOOSE.
OUTFLOW FAIR ALQDS. SYSTEM BCMG MORE
ORGANIZED AS OUTFLOW IMPROVES. AMOUNT
OF DEEP CNVCTN INCRSG AND CLOUD TOP TEMPS
CONT TO COOL. FT BASED ON DATA T AND PATTERN T
STUPENDOUS MAN