Screen "Risk encounters" needs background information/help to be intelligeable

[melibokus-h2]

The screen Risk encounters (German: Risiko-Begegnungen) has information which needs some (more) explanation. Otherwise its hard to understand. The explanation should cover the following aspects:

• German: "Report-Typ: rekursiv" == What does it mean? Which other report types are possible? Both answers are missing on screen and in the App information with GitHub.

• German: "Übertragungssrisiko. X" == What does it mean (1= low, 4 = medium, 8=high) should be on the screen not only in the help with GitHub (where I found it).

• German: "Tage seit Beginn der Symptome: X" == Who's symptoms are meant? The App-user should have notices symptoms since X days? Probably better the "Bei Ansteckung erste Symptome erwartet vor Stunden: X". Ttpischerweise werden Symptome laut RKI 5-6 Tage nach Ansteckung erwartet: (https://www.rki.de/DE/Content/InfAZ/N/Neuartiges_Coronavirus/Steckbrief.html;jsessionid=12EAB0956C7AA32601E7DEB271B2933E.internet101?nn=13490888#doc13776792bodyText5)

• "Gemeldete Sendeleistung: X dB". How is this related to the Y-axis of the Diagram "Abstand (Dämpfung in dB)". In my case "Dämpfung" shows values between 90 and 100 whereas "Sendeleistung" shows 3 dB. Is it possible to get the relation between the two values explained?

Is at least an Update of the README.md description concernig these aspects possible?

[mh-]

The first three points have changed over time (the way the country apps make use of these parameters). There's a slack channel where some people who are knowledgeable about aspects of this could maybe be found: http://covidapps.herokuapp.com

About your last point:

Only the y-axis is really relevant, it shows the attenuation (the difference between reported sending power and measures received power). This is the only data available to estimate the distance during the encounter. "Attenuation is a very noisy proxy of distance", see https://developers.google.com/android/exposure-notifications/ble-attenuation-overview

The reported TX power is only shown, because at some point in time some people believed the system might be abused by bad actors relaying signals and modifying the reported TX power value to increase the effectiveness of their attack. This display could have helped a bit in analyzing this.

[nurps]

I also think some infos about what the values mean would be great.

And what is German: "Tage seit Beginn der Symptome: X"? Is it for the date the encounter happend or is it now? Like if I met one person 14 days ago that has symptoms since 1 day, does it mean he just started today (14 days after the meeting) and probably wasn't infected when we met, or did he have symtoms for one day already when we met?

Also people can be testet positiv without symtoms, whats the value for that?

[warnappcompanion]

There's a slack channel where some people who are knowledgeable about aspects of this could maybe be found: http://covidapps.herokuapp.com