View item details
D Region Absorption Prediction, Release 2
Data Mining Tool
Outreach / Education
All Forecast Regions
The D-Region1 Absorption Prediction, Release 2 (D-RAP2) product provides a suite of graphic and text information about the global High Frequency (HF, defined here as 3-30MHz) radio propagation conditions related to the state of the ionospheres D-region. D-RAP2 will be web based (http://www.swpc.noaa.gov/drap/index.html) and is an enhancement of the current D Region Absorption Prediction product (http://www.swpc.noaa.gov/dregion/index.html). DRAP2 fills a void that exists in the current product by providing absorption information due to energetic proton precipitation at high latitudes. The web site provides a main page containing a global map of the highest HF frequencies affected by a 1dB attenuation, estimated recovery times, and links to subordinate pages. Subordinate pages containing north and south polar maps of the highest frequencies affected by a 10dB attenuation and ASCII tabular values of total absorption at 10 MHz. DRAP2 is updated every minute (see below for regional update latency) SWPC data and products are designed to provide accurate and real-time space weather information for the safety and benefit of our customers.
Product information and survey access
Point of Contact
Document (e.g. PDD)
(OPTIONAL) If you have a sample image, please upload.
Comment Start Date:
0000-00-00 Comment End Date: 0000-00-00
David B. Caldwell
Transition to Operational
Web page still links to experimental PDD 3/18
Last edit date to this meta-data: 2019-07-01