DYNAMO Cruise Info

TOGA Radar Scanning

Timothy Lang

Revelle Ship Schedule

DYNAMO Leg 123 August Arrive Port DarwinInstall TOGA Radar29 August Depart Darwin, Australia

Schedule as of 27 April 2011

Revelle Ship Schedule

DYNAMO Leg 15 September Arrive/Depart Cocos (Keeling) IslandsStaff exchange

Revelle Ship Schedule

DYNAMO Leg 126 September Arrive Tuticorin, India (aka Thoothukudi)

DYNAMO Leg 229 September Depart TuticorinPark at 80 E (or further east) on Equator31 October Arrive Tuticorin

DYNAMO Leg 35 November Depart TuticorinPark at 80 E (or further east) on Equator10 December Arrive Tuticorin

DYNAMO Leg 414 December Depart TuticorinPinkel Cruise5 January Arrive Tuticorin

TOGA Radar Scanning during DYNAMO

Major Scan Period - 30 minutesThree minor periods plus single low-PRF 0.5° sweep (300-km range)

Minor Scan Period - 10 Minutes8-10 minutes full 360° PPI volume0-2 minutes RHIs

Three Scan Types for PPI Volumes (150-km range)

Scan A - SHALLOW: 5 minutes emphasize shallow angles, repeatScan B - FAR: 8-9 minutes, top 15-18 km beyond 30-40 km range, emphasize vertical resolutionScan C – NEAR: 8-9 minutes, top 15-18 km within 30-40 km range, reduced vertical resolution

One RHI setScan D – 1-2 minutes, 2 ° s-1 rate, up to 40° elevation, 3-6 sweeps total

0 30 min 60 min

PPI, then RHI PPI, then RHIPPI, then RHIPPI, then RHI PPI, then SurvPPI, then Surv

Scan A – Run when there is nothing but sea clutter, or extremely shallow echo

Scan B – Default scan for 70-90% of raining periods

Scan C – Run when tall convection is very close to ship

Progress from Scans A to B to C as highest elevation angle becomes insufficient to top convection. Must anticipate as we change volumes on the 10s, not 5s.

Progress from Scans C to B to A as the highest elevation angle of the next shallowest scan becomes sufficient to top convection

Scan A will last 5 minutes and repeat (probably run a little shorter than 5 min to allow time for long-range single sweep every 30 minutes)

Precip Scans (B & C) will last 8-9 minutes, timing and angles TBDThe remaining time before the 10 minute mark will be filled with preset RHI sweeps (Scan D)

Every third minor period, RHIs will be replaced by single long-range sweepWill make use of timing capabilities in IRIS scan controller software

Timothy Lang will work with Steve Rutledge, Brenda Dolan, and Nick Guy to design angles and timing for all scans

Timothy Lang and Nick Guy will finalize all scans while on Leg 1, and will provide training documents (as well as in-person training to Leg 2 staff) at the end of Leg 1

Leg 2 participants, Nick and Timothy will train you in Tuticorin on 27 September. We leave 28 September, one day before the ship departs. Also recommend Legs 3 and 4 staff work with previous Leg’s staff to set a date for in-person training in Tuticorin.

Plan for 8-12 hour shifts, single scientist at a time, 24/7 ops. Scientists will be responsible for calling switches between A, B, & C, and for setting azimuth angles for Scan D.

You will take notes in a single word-processing document for the entire cruise, bring a copy of that document, along with data/imagery, with you when you disembark. New Leg starts a new scientific notes document.

Plan for radar imagery1. Install Texas A&M software on CSU laptop2. Archive data (UF or Raw) on CSU drives3. Run software daily to create a set of daily summary images4. Transfer imagery to Internet-capable computer via thumb drive5. Upload imagery once per day to DYNAMO servers