Release: RDA/RPG Build 20
Deployed: Summer 2021
Features:

1. Shift Change Checklist Updates


2. Inclusion of supplemental scans to dual pol QPE adaptation data


3. ZDR Bias estimate and display changes

Release: RDA/RPG Build 19
Deployed: Summer 2020
Features:

1. Introduction of new VCP 112, which uses the MPDA to create higher quality velocity products for severe weather operations


2. Improvements to the rain-hail mixture with regard to biases dual-pol precipitation estimation


3. Addition of low level supplemental scans to dual-pol QPE calculations.


4. Improvements to the 2DVDA particularly with dealiasing error reduction and improved shear handling


5. Expansion of the ZDR scale displayed in AWIPS


6. Additional supplemental low-level elevation angles at selected sites

Release: RDA/RPG Build 18.2
Deployed: Summer 2019
Features:

1. - Introduction of Mid-Volume Rescan of Low-Level Elevations (MRLE)
   • Adds 2-4 supplemental low-level scans to each volume scan
2. - Changes to CMD reducing residual clutter
   • Improvements to dual pol products
3. - Sites gaining supplemental below 0.5-degree elevation angles
4. - Software security updates

Release: RDA/RPG Build 18.0
Deployed: Spring 2018
Features:

1. - VCP Changes:
• New Precip Mode VCP 215
• New Clear-Air Mode VCP 35
• Removing VCP 11, 21, 211, 221
2. - RPG Changes
• HCA tuning to better identify:
  Wet snow or graupel in the melting layer
  Biota and clutter in the cold season
• New data windowing technique for better quality base data
3. - Algorithm Updates
• Tornado Rapid Update and Mesocyclone detection now use SAILS cuts
4. - Expanded set of PRFs
5. - Simplification of Z-R relationship naming in HCI

Release: RDA/RPG Build 17.0
Deployed: Summer 2016
Features:

1. - RDA Hardware Upgrade:
• RDA Signal Processor Refresh
2. - Product Changes:
• Hail Size Discrimination Algorithm
• Raw Differential Phase Product (PhiDP)
• Remove Outdated Products
3. - Adaptable Parameter Changes:
• Selecting Dual Pol QPE Tropical vs. Continental R(Z, ZDR)
• Met Signal within the Dual Pol Preprocessor
4. - H and V dBZ0 on RPG Control/Status Window
5. - RMRs can be used to request SAILS products

Release: RDA/RPG Build 16.1
Deployed: Spring 2016
Features:

1. - Multiple Elevation Scan Option (MESO) SAILS
2. - Dual Pol Raw Correlation Coefficient Product (SDC)

Release: RDA/RPG Build 16.0
Deployed: Summer 2015
Features:

1. - Supplemental Adaptive Intra-Volume Low-Level Scan (SAILS) updates:
• RPG HCI main page SAILS cut indicator
• Dual Pol products generated for SAILS cut
• Multiple Elevation Scan Option (MESO) SAILS Field Test
2. - Last elevation on RPG HCI main page
3. - For Dual Pol Quantitative Precipitation Estimation (QPE):
• Editable multiplier for Dry Snow (DS) below the top of the melting layer
• Reflectivity threshold for use of R(KDP) with Heavy Rain
• Maximum precipitation rate editable
• Digital Accumulation Array (DAA) generated at the top of each hour
4. - ZDR bias estimator based on Bragg scatter
5. - Automated Microburst Detection Algorithm
6. - RPG GUI changes for sites with wideband backup service

Release: RDA/RPG Build 15.0
Deployed: Fall 2014
Features:

1. - Dual-Pol Quantitative Precipitation Estimation (QPE) updates
2. - RPG estimated Initial System Differential Phrase (ISDP) process

Release: RDA/RPG Build 14.0
Deployed: Spring 2014
Features:

1. - Initial System Differential Phase (IDSP)
2. - Radial by Radial (RxR) Noise Estimation
3. - Coherency Based Thresholding (CBT)
4. - 8 Hour Performance Check Countdown
5. - Supplemental Adaptive Intra-Volume Low-Level Scan (SAILS)
6. - Update to the Automated Volume Scan Evaluation and Termination (AVSET) Algorithm
7. - Storm-Based Auto PRF
8. - Auto PRF for SZ-2 VCPs
9. - 2D-Velocity Dealiasing Algorithm Adjustments
10. - Dual-Pol RPG Algorithm Adjustments