Dear Patrick,

Thanks for the prompt response !

Can you provide some pointers on how we can create a bi-static configuration ?

We were thinking of two things:

1. Either see if iyRadioLink can be studied and then modified to bi-static 

2.  Look at the iyRadar :  but it only looks are purely back scattered 
radiation:  and it takes Z based on the back-scattering direction,
        If we can put the transmitter at the same place, and change the sensor 
position,  and use Z  based on the sensor-LOS direction (i.e. relative to the 
transmitter LOS),  could we then use the iyRadar use case ?

Please let us know! And ARTS is a phenomenal tool !  Just awesome  (We are not 
atmospheric scientists, but can still understand a lot from how ARTS is 
developed, structured and documented!!)

More later!


Ranjan S. Mehta, Ph.D.
Director / Senior Principal Engineer
CFD Research Corporation

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-----Original Message-----
From: Patrick Eriksson <> 
Sent: Thursday, September 2, 2021 1:19 AM
To: Farid Alam <>;; Ranjan Mehta <>
Subject: Re: [arts-users] iyRadioLink: Unknown Method

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Farid, Ranjan,

> Looks like method "*iyRadioLink*" is missing in ARTS 2.4.0, and ARTS
> 2.5.0 (dev).

Sorry, there is no replacement in v2.4 or v2.5. It should be resurrected to v3, 
but unclear when that version will appear.

I take the opportunity to also answering the question from Ranjan, sent to me 

1. Source  and receiver are similar to a bi-static radar arrangement.
2. And the cloud is more of a  "dust-cloud" than hydrometeors !

Unfortunately, there is no ready setup in ARTS for bistatic radars.
Simply as we have never encountered such an user case.

Is it the case that you want to solve this by iyRadioLink? That would be a 
possibility, but you have then to switch to v2.2.

Please note that you in any case have to provide the scattering data for dust 

Kind regards,


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