TTUKa Dual-Doppler Sectors

As discussed on the conference call this morning, we have switched our focus to dual-Doppler sectors.  The coordinates of the radars (for today) are as follows:

	TTUKa1	TTUKa2
Latitude	40.06212	40.08043
Longitude	-105.03716	-104.98412

We are currently running 30 degree sectors. The approximate north-relative azimuths for our sectors are 110 - 140 degrees for TTUKa1 and 193 - 215 degrees for TTUKa2. Factoring in the blanking region of TTUKa2, the dual-Doppler domain looks (roughly) like this:

The dual-Doppler domain is roughly 2 km W-E by 3 km N-S. This could change slightly (especially in the southern part of the domain) based on the choice of crossing angle and the slight differences in coordinates of each radar for a given deployment. 

To cover the layer from 80 - 120 m (AGL) over most of the domain, we are running 6 elevation tilts over the sectors. Due to a large elevation change over the domain, the 80 m level may not be resolved in the far SE corner. This level should be resolved over the supersite though.  Based on the data quality, we are operating in two modes: a slow scan mode where the entire volume is sampled in approximately 50 seconds (for marginal data quality) and a fast scan mode where the entire volume is sample in approximately 24 seconds (for awesome data quality). The elevation angle sequence for each radar is as follows: 

TTUKa1 Elevation Angles	TTUKa2 Elevation Angles
1.7°	1.5°
2.0°	1.8°
2.3°	2.1°
2.6°	2.4°
2.9°	2.7°
3.2°	3.0°

We have collected 2 hours of dual-Doppler sectors so far this afternoon using the slow scan mode. Data collection is on going (as of 23:20 UTC), but coordinated scanning has been paused to evaluate data quality. I will try to provide another update later this evening once we have confidently finished data collection.