NSF/NCAR Aircraft Field Project Computing Handbook

Size: px

Start display at page:

Download "NSF/NCAR Aircraft Field Project Computing Handbook"

Cornelia Rose
6 years ago
Views:

1 NSF/NCAR Aircraft Field Prject Cmputing Handbk Table f Cntents: 1. Integrating t the RAF Aircraft Cmputing Infrastructure 1.1. Basic Onbard Instrument Integratin Attaching t the Netwrk Timing Real-time Data Feed (IWG1) Sending Data t the NCAR Data Acquisitin System 1.2. Advanced Instrument Integratin Acquiring Data frm the Database Remte Instrument Cntrl Reprting Instrument Status 1.3. SATCOM 2. Real-time Sftware Tls & Prducts 2.1. Grund Database 2.2. Internet Relay Chat (IRC) 2.3. Display Sftware 3. RAF Pst-flight Data 3.1. Data Prducts netcdf file PMS-2D 3.2. Prviding Data t RAF fr Integratin 4. EOL Aircraft Sftware Dwnlad Page Natinal Center fr Atmspheric Research Research Aviatin Facility, Earth Observing Labratry Airprt Curt Brmfield, CO (303)

2 1. Integrating t the RAF Aircraft Cmputing Infrastructure 1.1. Basic Onbard Instrument Integratin This sectin describes integrating t the mst cmmnly used features f the NCAR aircraft cmputing infrastructure Attaching t the netwrk There are tw separate Gigabit Ethernets nbard. One is fr data cllectin and the secnd is fr data display. The tw nets are cnnected thrugh the central server, which prvides DHCP t bth netwrks is fr RAF data cllectin. Users will nt typically cnnect t this netwrk is the display and general-purpse netwrk. The netwrk switch n this subnet prvides Pwer ver Ethernet (PE) Timing There are 3 pssible methds f acquiring time. Each aircraft is equipped with a netwrk time server. These prvide NTP, IRIG-B, and 1-PPS signals. Netwrk Time Prtcl ( NTP ) Accurate t a few millisecnds. Hstname is 'timeserver' and is available n bth netwrks. Addresses & Meinberg has a Windws client if yu want smething different frm the 1

3 WindwsXP default. 2 Anther tl t setup the WinXP NTP client, with a clck. 3 IRIG-B 123 (AM) standard. Definitin PDF Accurate t a few micrsecnds. This will require the purchase f an IRIG-B card. Wall plate feeds are available thrughut the aircraft. Pulse per Secnd ( 1-PPS ) Wall plate feeds are available thrughut the aircraft. It is pssible t get yur wn GPS antenna feed. Make sure t request this far enugh in advance Real-time data feed (IWG1) 4 NCAR distributes the IWGADTS recmmended data packet n all aircraft. It is UDP bradcast t and n prt UDP t RS-232 cnverters can be prvided. Request in advance as they need t be munted. This packet has a 2-3 secnd delay between data acquisitin and receipt t users. The time tag is f data acquisitin Sending Data t the NCAR Data Acquisitin System Users wishing fr NCAR t recrd their data r make data available fr display nbard r n the grund shuld plan sending an ASCII packet f data. We can accept data via UDP r RS-232. ASCII packet shuld be cmma-separated values (CSV) with the fllwing cmpnents: Instrument Key Wrd first Time-stamp (ISO-8601 cmpliant) secnd. Leave blank if yu dn t have ne

4 (keep as a place hlder, s tw cmmas in a rw). CSV data pints e.g. CFDC, T120500,35.2,5,79.33 Fr UDP: Send t hst We will agree n a prt later (abve 31000). Newline / carriage return nt needed Advanced Instrument Integratin This sectin describes mre advanced features f the NCAR data acquisitin and cntrl system Acquiring data frm the database 5 EOL is using the PstgreSQL database fr real-time data access and display. 6 Aircraft/DatabaseTables Current layut f database tables. 7 Aircraft/SQLExamples Sme C prgram examples t access the database. On-bard Grund Remte Instrument Cntrl EOL has develped a secure cmmunicatin infrastructure fr remte instrument cntrl and mnitring ver lw bandwidth links. Please inquire fr further infrmatin

5 Reprting Instrument Status Instruments wishing t prvide a status web page can multicast the belw XML packet t n prt and the central server will pick it up. Example: <?xml versin="1.0" encding="utf-8"?> <grup> <name>dsm303</name> <clck>12:45:21</clck> <frequency>1</frequency> <health>green</health> <status><![cdata[<html><h1>mtp Status</h1><hr>Instrument wrking awesme!<p></html>]]></status> </grup> Instrument name, smething shrt: <name>dsm303</name> Time f status: <clck>12:45:21</clck> Expected frequency f this packet in secnds. This is s the receiving sftware can decide when the instrument is n lnger reprting: <frequency>1</frequency> A shrt verall health [ Red r Green, 0 r 1? ]: <health>green</health> This sectin is ptinal. If it exists it shuld cntain an HTML dcument which will be rendered n the status web-page available at all cmputers nbard the aircraft: <status> <![CDATA[<html> A status web page </html>]]>

6 </status> 1.3. SATCOM Bth the C130 and GV are equipped with INMARSAT 4 Swift Bradband (SBB) and Iridium. Cst fr INMARSAT Full time 432Kbps and csts $5.03 per Megabyte. We average apprx. $200 per hur. Data Feed t Grund A subset f parameters cllected n the plane is shipped t the grund. Data can be sent every N secnds (cnfigurable n a per prject/flight basis). Default is every 5 secnds. File Transfer t/frm Aircraft Unidata LDM is used t transfer files. Delay is typically secnds. Security, Firewalls, etc. The aircraft is firewalled and s is NCAR. Only a few usable prts. HTTP and Unidata LDM are currently the nly 2 pen prts int NCAR. Cverage and Drputs 8 INMARSAT Cverage map. Outages f 3-5 minutes are nt uncmmn. In the cntinental United States, a 10 degree banked turn away frm the Galapags Islands is enugh fr the GV t lse cntact. 8

7 2. Real-time Sftware Tls & Prducts 2.1. Grund Database A subset f the aircraft database is mirrred t the grund. The expsed hst fr the aers database is el-rt-data.fl-ext.ucar.edu Internet Relay Chat (IRC) Chat is available between participants f a field campaign. Persnnel abard the aircraft can cmmunicate with grund persnnel when satellite cmmunicatins are peratinal. Clients include: xchat fr linux HexChat fr MS Windws Lime r Aqua fr Mac OS Cllquy fr iphne Chat server is rdcc.fl-ext.ucar.edu/6668 Yu will need a passwrd t cnnect t this. Cnfiguring chat client nbard Turn ff 'away-tracking', this generates a lt f traffic. Knwn prblems / issues There is n feedback when cmmunicatins between aircraft and grund g dwn. Messages disappear int the ether Display Sftware 9 Primary real-time display prgram fr mnitring instrument data: aers ASCII and time-series, XY, skewt and track plts. bth nbard and grund based. 9

8 Multi-platfrm: Linux, Mac OS, and Windws. Catalg Maps is a web based tl which prvides real-time flight tracking with integrated weather prducts Bth nbard and grund based.

9 3. RAF Pst-flight Data 3.1. Data Prducts 10 The Primary RAF data prduct is delivered as a netcdf file. This file includes all scalar and mst vectr/histgram (PMS-1D) data. Instruments that require large bandwidth t recrd are typically recrded separately netcdf file 11 RAF netcdf Cnventins Examples fr extracting Time frm the netcdf file Display Sftware (ncplt and ncpp) PMS-2D PMS-2D data is recrded in a separate file. Fllw the 'Descriptin' belw fr data frmats and mre. 14 Descriptin Display Sftware (xpms2d) Prviding Data t RAF fr Integratin Data shuld be prvided in NASA Ames Data Exchange Frmat (DEF). Please nte the tw mdificatins in the example belw: Hw units are in parentheses at the end f the line The list f shrt variable names in the last line f cmments (make sure t increase cmment line cunt)

10 Sample: Webster, Chris NCAR Research Aviatin Facility NSF-NCAR-GV N677F HIPPO-Glbal Time in secnds frm 00Z Vertical Differential Pressure, Radme (hpa) Attack Angle, Radme Diff. Pressure (degree) IRS Altitude (m) Avinics GPS Altitude (MSL) (m) 0 1 UTC ADIFR AKRD ALT ALT_G Dwnlad Links EOL sftware dwnlad page: RAF ntes n building frm surce:

VIP-200. Point to Point Extension Configuration Quick Start Guide. Video over IP Extender and Matrix System

VIP-200. Point to Point Extension Configuration Quick Start Guide. Video over IP Extender and Matrix System VIP-200 Vide ver IP Extender and Matrix System Pint t Pint Extensin Cnfiguratin Quick Start Guide PureLink TM 535 East Crescent Avenue Ramsey, NJ 07446 USA Cntents What is in the bx... 3 Transmitter kit