Google Analytics

This website uses Google Analytics to help analyse how visitors use the site's services. Google Analytics uses “cookies”, small text files placed on your computer, to collect standard internet log information and visitor behaviour information in an anonymous form. Google Analytics' 'Demographic' functionality is explicitly not enabled for this site; no personally identifiable information is collected.

The anonymous information generated by Google Analytics is transmitted directly to Google and processed to compile statistical reports on activity as it relates to this site. The aggregated information is used by myself to determine the relative popularity of the site's services, informing future decisions on where best to spend development time to better meet visitor's needs.

Google's privacy policy is formally defined here.

Opting Out

Users wishing to prevent their data from being used by Google Analytics may install the Google Analytics Opt-out Browser Add-on, available from


This website uses “cookies”, to retain information between sessions. These are stored on the user's machine so that subsequent page loads are initialised with the user's preferences. The cookies are not distributed to, nor made available to, any third party.

Used by the site to store and ISO code identifying the user's prefrerred langauge (e.g. 'de', 'es', etc.). Users who only use English may not see this cookie.
This cookie is set when a user closes a WWV warning message and is used to suppress further messages for three hours (the interval at which WWV warnings are published).
rxlat, rxlng
Coordinates of the preferred Receive location.
A string representing the user's preferred source of ssn data.
A string representing the preferred traffic type, used to set the Traffic drop down menus when a page is opened.
The traffic bandwidth value, used when traffic is set to 'User Defined'.
The traffic required SNR value, used when traffic is set to 'User Defined'.
txlat, txlng
Coordinates of the preferred Transmit location.
Tranmitter power (W).
Created by the Flask Framework used to build the site. Proppy does not store any values in this cookie.
_ga, _gat
Used by Google Analytics to distinguish (not identify) users and throttle requests respectively. Further details of these cookies may be found at the Google Developers page,

The cookies created by Proppy are not encrypted and current values may be readily examined using a browser's cookie manager. All cookies are designed to persist between sessions for up to six-months with the exception of 'mute-wwv-msg' which persisst for three-hours. Any cookies generated may be deleted by the user at any time using the browwer's cookie manager.

Planner Plots

The plots created by the planner application are stored on the server for up to two-hours, after which time they are automatically deleted. No user-generated plots are archived or otherwise stored.


It is strongly recommended that users access the site using the secure https protocol;