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logosmallarcetri Arcetri Technical Report 2/2015

SKA Project Series
Mapping SKA ICDs to Tango Control System

C.Baffa, E.Giani

INAF Osservatorio Astrofisico di Arcetri

Abstract

Following the SKA TM-LMC Trieste workshop decision to use Tango Control System as the standard framework for Monitoring and Control, we decided to explore some of the details of a possible implementation of SKA ICDs in terms of Tango structures.

We strongly hope this to be a first step toward a common set of Tango device driver classes shared with as much SKA software as possible. In this project memo we will speak about the TM - Element-LMC interface, yet most of this structure can be used at a lower level.

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logosmallarcetri Arcetri Technical Report 2/2015

SKA Project Series
LFAA Tile Beamformer structure

G. Comoretto

INAF Osservatorio Astrofisico di Arcetri

Abstract

The LFAA tile processing modules (TPM) combine the signals from 256 dual-polarization antennas, in the frequency range 50-350 MHz, into a single station beam. Beamforming is done hyerachically, with the TPM first combining the 16 antennas that are processed in the module, using the Tile Beamformer described here, and then combining these partial beams into the station beam, using a daisy chain structure.

The Tile Beamformer receives antenna samples already channelized, with a channel spacing of 750 KHz, and align each antenna in the frequency domain using a phasor computed in real time from delay and delay rate informations. It is possible to select up to 16 idependent portions of the input frequency range, each one pointing in a different direction.

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logosmallarcetri Arcetri Technical Reports 1/2015

Progetto Giano
Proposta per la controllistica della nuova preslit di Giano

C.Baffa, E.Giani

INAF Osservatorio Astrofisico di Arcetri

Sommario

In previsione del possibile spostamento di Giano al Nashmit B, con il conseguente rifacimento della ottica di pre-slit, vengono qui esposte in breve tre differenti proposte per il software di controllo dei necessari attuatori e sensori. Vengono anche discusse le conseguenze del limitato manpower disponibile.

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Arcetri Technical Reports 2015


1/2015Proposta per la controllistica della nuova preslit di Giano
C.Baffa, E.Giani    
2/2015LFAA Tile Beamformer structure
G.Comoretto     		 
3/2015Mapping SKA ICDs to Tango Control System
C.Baffa, E.Giani, S.Vrcic		 
 
  
  
  
  

logosmallarcetri Arcetri Technical Report 4/2014

SKA Project Series
Structure and processing of the F section for SKA

G. Comoretto

INAF Osservatorio Astrofisico di Arcetri

Abstract

The three (Low, Mid and Survey) SKA correlators share a similar structure, with a FX architecture. The F part has a total of the order of 2 18 channels, with a dual stage filter-bank. The first stage provides channelization with overlapping channels, while the second provides non overlapping channels with good channel-to-channel insulation.

The channelization parameters (filter shape vs. filter complexity, overlapping amount, etc) are similar for the correlators, despite important differences in bandwidth, physical implementation, etc. We discuss these parameters, with considerations on the specificity of the three correlators.

The delay and fringe compensation functions are also implemented inside the channelizer, and are discussed here.

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Altri articoli...

  1. 14-3
  2. 2014 Reports List
  3. 14-1
  4. 14-2