Interacting with radio telescopes in real-time during VLBI sessions using e-control

Transcription

1 Interacting with radio telescopes in real-time during VLBI sessions using e-control Alexander Neidhardt (FESG) Martin Ettl (FESG), Helge Rottmann (MPIfR), Christian Plötz (BKG), Matthias Mühlbauer (BKG), Hayo Hase (BKG), Walter Alef (MPIfR), Sergio Sobarzo (Udec), Cristian Herrera (Udec), Ed Himwich (NASA/GSFC/NVI) Alexander Neidhardt 1

2 The Radio Telescope Wettzell (RTW) and it s location Federal Agency for Cartography and Geodesy, Frankfurt Alexander Neidhardt 2 ee: Download 2010/0217 Technische Universitaet Muenchen Research Group Satellite Geodesy Geodetic Observatory Wettzell Germany surrounded by the Bavarian Forest

3 The Radio Telescope Wettzell (RTW) and it s location Time& Frequency Radio Telescope Wettzell Meteo Laser Ranging Telescope Ringlaser (Large gyroscope) New gravimetry house GPS Area of the new Twin Radio Telescope Wettzell Gravimetry Alexander Neidhardt 3 ee: Download 2010/0217

4 The Radio Telescope Wettzell (RTW), it s team and partner sites RT Wettzell/Germany TIGO Concepción/Chile GARS O Higgins/Antarctica The Wettzell VLBI crew (from left to right): Ch. Plötz, E. Bauernfeind, G. Kronschnabl, R. Schatz, W. Schwarz, R. Zeitlhöfler, A. Neidhardt (missing in picture: E. Bielmeier). And in the future: TTW Wettzell Alexander Neidhardt 4

5 The Radio Telescope Wettzell (RTW): impressions of current activities Alexander Neidhardt 5

6 The Radio Telescope Wettzell (RTW): impressions of current activities Alexander Neidhardt 6

7 The TWIN Radio Telescope Wettzell (TTW): impression Diameter Main reflector: 13.2m Diameter sub-reflector: 1.48m Ring Focus Design with f/d = 0.29 Surface quality of the reflectors: < 0.2 mm RMS Way length error : < 0.3 mm Surface quality of the panel: < mm RMS ALMA mounting with angular velocities Angular velocities of 12 /s in azimuth and 6 /s in elevation Acceleration: Az/El = 3 / s2 Ranges of rotation: Azimuth 540, Elevation Balanced outrigger Excellent bearing 27Bit Encoder: resolution Sub-reflector adjustable via a hexapod See TWIN poster! Alexander Neidhardt 7

8 The idea of controlling VLBI telescopes by remote Alexander Neidhardt 8

9 New observation strategies for VLBI telescopes Wettzell, O Higgins/Antarctica and TIGO/Concepción Tele-working Remote Control on Site Communication RT Wettzell/ Germany TTW Wettzell/ Germany TIGO Concepción/Chile GARS O Higgins/Antarctica Alexander Neidhardt 9

10 New observation strategies for VLBI telescopes Wettzell, O Higgins/Antarctica and TIGO/Concepción Local - Standard operations - Local operator Alexander Neidhardt 10

11 New observation strategies for VLBI telescopes Wettzell, O Higgins/Antarctica and TIGO/Concepción Internet Local Remote - Standard operations - Local operator - Check system states from everywhere at the observatory - Tele-working - Remote assistance and diagnostics - Control very remote, inaccessible telescopes Alexander Neidhardt 11

12 New observation strategies for VLBI telescopes Wettzell, O Higgins/Antarctica and TIGO/Concepción Internet Internet Local Remote Shared - Standard operations - Local operator - Check system states from everywhere at the observatory - Tele-working - Remote assistance and diagnostics - Control very remote, inaccessible telescopes - Save, passive data live monitoring - Dedicated control access by responsible person - Shared access from different observatories - Shared night shifts Alexander Neidhardt 12

13 New observation strategies for VLBI telescopes Wettzell, O Higgins/Antarctica and TIGO/Concepción Internet Internet Local Remote Shared Unattended - Standard operations - Local operator - Check system states from everywhere at the observatory - Tele-working - Remote assistance and diagnostics - Control very remote, inaccessible telescopes - Save, passive data live monitoring - Dedicated control access by responsible person - Shared access from different observatories - Shared night shifts - Observations run autonomous, (semi-) automated and unattended Alexander Neidhardt 13

14 New observation strategies for VLBI telescopes Wettzell, O Higgins/Antarctica and TIGO/Concepción Internet Internet Local Remote Shared Unattended - Standard operations - Local operator - Check system states from everywhere at the observatory - Tele-working - Remote assistance and diagnostics - Control very remote, inaccessible telescopes econtrol* - Save, passive data live monitoring - Dedicated control access by responsible person - Shared access from different observatories - Shared night shifts * per system with individual restrictions and only with reliable, well educated personnel staff on site - Observations run autonomous, (semi-) automated and unattended Alexander Neidhardt 14

15 New observation strategies for VLBI telescopes Wettzell, O Higgins/Antarctica and TIGO/Concepción Internet Internet Local Remote Shared Unattended - Standard operations - Local operator - Check system states from everywhere at the observatory - Tele-working - Remote assistance and diagnostics - Control very remote, inaccessible telescopes econtrol* - Save, passive data live monitoring - Dedicated control access by responsible person - Shared access from different observatories - Shared night shifts * per system with individual restrictions and only with reliable, well educated personnel staff on site - Observations run autonomous, (semi-) automated and unattended SysMon Alexander Neidhardt 15

16 Wettzell s solution for remote control Alexander Neidhardt 16

17 The idea: remote attendance and control of VLBI telescopes Wettzell, O Higgins/Antarctica and TIGO/Concepción Presentation & user interface code Device control code Communication code Interface definition Strict design-separation of these parts Alexander Neidhardt 17

18 The idea: remote attendance and control of VLBI telescopes Wettzell, O Higgins/Antarctica and TIGO/Concepción Graphical User Interface (GUI) Client FS Monitor Client GUI FS Monitor Client Communication Communication Network Interface definition FS Monitor Server Communication FS Monitor Server Functionality e-control Server functionality FS Monitor FS Alexander Neidhardt 18

19 The communication with a remote procedure call middleware and ssh FS Monitor Client GUI FS Monitor Client Communication Network FS Monitor Server Communication FS Monitor Server Functionality FS Monitor FS Alexander Neidhardt 19

20 The communication using a middleware generator fsmc.idl Step 1: Write interface definition for fsmc idl2rpc.pl fsmc.idl Step 2: Call idl2rpc.pl to generate communication code Step 4: Write code for data presentation FS GUI (wxwidgets) Automatically generated communication code FSconnection code Step 3: Write code to connect to fieldsystem g++ Step 5: Compile g++ Graphical User Interface (GUI) Internet Command line shell Web Interface fsmc Client fsmc Server Alexander Neidhardt 20

21 SSH as security layer Possibility 1: Direct access Possibility 2: Access via direct SSH-Tunnel Possibility 3: Access via SSH-Tunnel to firewall Possibility 4: Access via direct SSH-Tunnel over SSH- Tunnel to firewall Client controlled connections Client controlled connections Client controlled connections Client controlled connections SSH-Tunnel to firewall SSH-Tunnel to firewall Firewall Firewall Direct SSH-Tunnel Direct SSH-Tunnel RPC-Connection RPC-Connection RPC-Connection RPC-Connection Autonomous process cell Autonomous process cell Autonomous process cell Autonomous process cell Alexander Neidhardt 21

22 Server extension to existing control software remote accessible, autonomous process cells FS Monitor Client GUI FS Monitor Client Communication Network FS Monitor Server Communication FS Monitor Server Functionality FS Monitor FS Alexander Neidhardt 22

23 A fieldsystem extension autonomous process cells Autonomous process cell offers remote access to the field system (at the moment Linux based) Watchdog- (Father-) Process Activation Own code Simple Log Access or e-shell output FS Shared Memory e-shell* Fieldsystem Memory Request Automatic Safety Device Request Own code SNAP Inject Must be written by user Alexander Neidhardt 23

24 The client remote (graphical) user interface FS Monitor Client GUI FS Monitor Client Communication Network FS Monitor Server Communication FS Monitor Server Functionality FS Monitor FS Alexander Neidhardt 24

25 The client graphical, textual or browser based Separation of control and presentation logic Interchangeability of presentation layer (console shell (ncurses), graphical user interface (wxwidgets), web access via Browser, web service, ) Remote controllable via client-server-architecture on idl2rpc-middleware Modularity in window units and additionally possible, separately created administration user interfaces for each device Basis for graphical user interface: wxwidgets (C++ based Open- Source-Framework for platform independent development of graphical user interfaces) Webcam Alexander Neidhardt 25

26 The client graphical, textual or browser based Graphic and Classic main interface ogbook Remote program startup hat SSH Alexander Neidhardt 26

27 The client graphical, textual or browser based Planned overview and all-in-one control for several sites Overview RTW TTW1 TTW2 TIGO O Higgins Overview Site Cam State Schedule Time Last error Source Next RTW TTW1 TTW2 TIGO O Hig Alexander Neidhardt 27

28 The first complete shared observation tests Wettzell and TIGO FS Monitor Client GUI FS Monitor Client Communication Network FS Monitor Server Communication FS Monitor Server Functionality FS Monitor FS Alexander Neidhardt 28

29 The first complete shared observation tests (IVS-session R4438) GO Wettzell/ Germany Firewall Router ssh to fieldsystem Internet RPC TIGO Concepción/Chile R4438 R4438 Alexander Neidhardt 29

30 First release is available now for testing! Feel free to try and to adapt it for your system!!! And the future... Wettzell??? Japan (?)? Concepciòn? Tasmania O Higgins Alexander Neidhardt 30

31 And the future... 1) Participation at the NEXPRES-project proposal (EVN) including the development of an operator based security system (authentication and authorization, read and write control, control handover etc.) together with the MPIfR Bonn 2) Main focus lies also on finalizing (and maybe offering) a complete control system for SLR in same style 3) Development of an additional monitoring systems to realize a stable system overview 4) Realization of hardware-level devices with same interface technique within the field system (similar to SLR-control system) 5) Improve the technology => Technical GGOS or SKA realizations How to get the software? to neidhardt@fs.wettzell.de Alexander Neidhardt 31

32 Thank you! RTW TTW1 TTW2 OHIGGINS TIGO SOSW WLRS Datenzentren Similar to: Hase, Hayo; et. al.: Twin Telescope Wettzell (TTW) a VLBI2010 Radio Telescope Project. IVS General Meeting 2008 And this is a lucky remote observer in his private home observatory controlling the radio telescope in Wettzell immediately after waking up! Alexander Neidhardt 32