May 2008 - AMSAT-BB - mailman.amsat.org

Cute-1.7 : FM Packets All Over the World !
by Hiroki Ashida 21 May '08

21 May '08

Dear All, I'm Hiroki Ashida at Tokyo Institute of Technology (JQ1YCZ) and I'd like to inform you about our satellite's operation which starts very soon. We're preparing for a long-run (continuous 12hour) of the APD (avalanche photo-diode) carried on Cute1.7 + APD II, as a radiation monitor of low-energy (E> 10 keV) particles trapped in the LEO (low Earth orbit). While the APD is operating, the status packet of APD is transmitted every 16seconds (TBD). The observation will start at 10:40, May 21 (UTC) and the APD will be turned off on 22:40, May 21(UTC). So the APD packet can be received everywhere in the world! This is the first time that Cute-1.7 + APD II transmits its FM packet around the globe. Though the observation data will be stored in FRAMs, we'd like to know a real-time status of the APD during the observation. Your kind reports will be highly appreciated. FM packets are transmitted on 437.475MHz and packet formats are available in the following web-page. http://lss.mes.titech.ac.jp/ssp/cute1.7/fm_mode_apd_e.html 4A-51-31-59-54-43-3E-4A-51-31-59-43-5A-3A-D0-30-77-B8-03-16-99 For exapmle, according to an above APD status packet we can obtain informations as; 4A-51-31-59-54-43-3E-4A-51-31-59-43-5A-3A : Header(JQ1YTC>JQ1YCZ) D0 : APD Packet ID (Fixed) 30 : Status Code APD Status : Operational HV Status : Set Value = Output Value Temp Correction : Active Data Mode : Counter Valid Detector : APD A APD Gain : Gain 30 Threshold : 219mV 77 : Temperature 0x77 = 119 -> (119/255)*91.712-48.569 = -5.7 [degC] B8 : High Voltage 0xB8 = 184 -> (184/255)*396.5 = 286 [V] 03-16-99 : Counter 0x1699 = 5785 -> 5785 * 2^3 = 46280 Latest TLE from NORAD is; Cute-1.7 + APD II 1 32785U 08021C 08140.34460534 +.00000335 +00000-0 +49764-4 0 00590 2 32785 097.9939 200.3316 0014139 226.7351 133.2682 14.81357711003132 Best Regards, Hiroki Ashida Cute-1.7 + APD II -- Hiroki Ashida <hiroki(a)lss.mes.titech.ac.jp> Laboratory for Space Systems Department of Mechano-Aerospace Engineering Tokyo Institute of Technology TEL/FAX : +81-3-5734-2644 Room 554, Ishikawadai 1st Bldg, Tokyo Institute of Technology 2-12-1 O-okayama, Meguro-ku, Tokyo, Japan

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Re: Amateur Radio Packet Stations near Raleigh, NC
by Mark L. Hammond 20 May '08

20 May '08

Hello Dante, I live about 40 miles south of Raleigh--maybe I can help? Please contact me directly and we'll see what we might work out. 73, Mark N8MH >Date: Tue, 20 May 2008 14:06:09 -0400 (EDT) >From: Dante Buckley <dante35(a)ufl.edu> >Subject: [amsat-bb] Re: Amateur Radio Packet Stations near Raleigh, NC >To: amsat-bb(a)amsat.org >Message-ID: > <1735077710.355501211306769558.JavaMail.osg(a)osgjas04.cns.ufl.edu> >Content-Type: text/plain; format=flowed; charset=us-ascii > >Hi all, > >Is there anyone who has a AX.25 packet station to assist us in >testing and evaluating a ground communications system near >Raleigh, North Carolina? The ground communications system consists >of packet radio which operates at 2 meter and 70 centimeter bands. >For the more information, please email Angels >(mandelui(a)hotmail.com) and/or me (dante35(a)ufl.edu) about providing >us with amateur packet radio support. > >73, >Dante ~ KI4LDJ Mark L. Hammond [N8MH]

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re seeds
by Angus 20 May '08

20 May '08

Hi I have swapped PCs over and managed to loose all the kelps for the seeds, anyone email me them please? regards Gus M0IKB -- I am using the free version of SPAMfighter for private users. It has removed 79 spam emails to date. Paying users do not have this message in their emails. Get the free SPAMfighter here: http://www.spamfighter.com/len

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Re: Amateur Radio Packet Stations near Raleigh, NC
by Dante Buckley 20 May '08

20 May '08

Hi all, Is there anyone who has a AX.25 packet station to assist us in testing and evaluating a ground communications system near Raleigh, North Carolina? The ground communications system consists of packet radio which operates at 2 meter and 70 centimeter bands. For the more information, please email Angels (mandelui(a)hotmail.com) and/or me (dante35(a)ufl.edu) about providing us with amateur packet radio support. 73, Dante ~ KI4LDJ

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want to buy Bird slugs
by Joe W2KJ 20 May '08

20 May '08

Want to buy one each of the following slugs for the Bird 4410A wattmeter: 4410-3 1kw 2mhz-30mhz 4410-15 100w 1ghz-1.8ghz Hope someone has a few spares of the above slugs. 73, Joe W2KJ

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SEEDS in FM packet mode
by Mike Rupprecht 20 May '08

20 May '08

SEEDS was in FM packet mode today (May, 20) at 1045UTC. I decoded more than 270 packets. 2008-05-20 10:47:11.860 UTC: [95 Bytes KISS Frame (without CRC)] 1 > C0 00 94 A2 62 B2 8E AC 60 94 A2 62 B2 8E AA 61 03 F0 F9 01 21 > B2 D4 00 02 01 5B 00 00 00 01 00 01 00 01 00 00 00 00 0B A1 41 > 0B D3 0B 99 0B 9D 0B CE 0C 08 00 05 00 00 00 07 00 05 00 00 61 > 00 05 0C D7 0F FA 07 EE 07 9F 08 17 08 42 07 29 08 0C 0A 08 81 > 0A 03 0A 02 09 FF 09 FE 0A 3A 09 DE 0A 1B C0 2008-05-20 10:47:13.020 UTC: [95 Bytes KISS Frame (without CRC)] 1 > C0 00 94 A2 62 B2 8E AC 60 94 A2 62 B2 8E AA 61 03 F0 F9 01 21 > B3 10 00 02 01 60 00 00 00 01 00 01 00 01 00 00 00 00 0B A1 41 > 0B D1 0B 9D 0B AE 0B D5 0C 07 00 05 00 00 00 07 00 04 00 00 61 > 00 05 0C C6 0F F7 07 EC 07 A0 08 17 08 40 07 2C 08 0F 0A 01 81 > 0A 02 0A 06 09 FC 09 FC 0A 3B 0A 3C 0A 1C C0 2008-05-20 10:47:14.200 UTC: [95 Bytes KISS Frame (without CRC)] 1 > C0 00 94 A2 62 B2 8E AC 60 94 A2 62 B2 8E AA 61 03 F0 F9 01 21 > B3 4C 00 02 01 65 00 00 00 01 00 01 00 01 00 00 00 00 0B A1 41 > 0B D1 0B 9E 0B AA 0B D1 0C 06 00 05 00 02 00 07 00 05 00 00 61 > 00 05 0C CE 0F F7 07 EF 07 A0 08 18 08 3F 07 27 07 27 0A 03 81 > 0A 03 0A 04 09 F7 09 FC 0A 35 0A 3C 0A 18 C0 73, Mike DK3WN

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Re: AAUSAT-11
by Mineo Wakita 20 May '08

20 May '08

I translated into English from DK3WN's page for AAUSAT-II telemetry: http://www.dk3wn.info/sat/afu/sat_aau.shtml Please see it: http://www.ne.jp/asahi/hamradio/je9pel/aausati2.htm de JE9PEL, Mineo Wakita

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L band helix radome
by w7lrd＠comcast.net 20 May '08

20 May '08

Hello Has anyone tried buinding a helix with a radome similar to the one used by Directive Systems. I would like to do it right the first time and not reinvent the wheel. 73 Bob W7LRD Seattle -- "if this were easy, everyone would be doing it"

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GHz receivers and Mars
by D. Mynatt 20 May '08

20 May '08

Any one in the group been dreaming or scheming to be able to directly receive Mars Lander telemetry? Dave/KA0SWT

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Re: AOP-1 Circular Polarization?
by Ronald G. Parsons 20 May '08

20 May '08

Assuming the antennas you reference do produce circular polarization, radiation wise, it doesn't matter whether you mount them in an X or + orientation. The only difference would be the phase of the radiation, and you are not concerned with that. There could also be a difference between right- or left-circular polarization, but whether that matters depends on the polarization the the satellite's antenna. But X or + does not change that. There might be some mechanical reason for an X or +, such as weather proofing, but not signal wise. Ron W5RKN > Date: Sun, 18 May 2008 14:28:34 -0400 > From: Sebastian <w4as(a)bellsouth.net> > Subject: [amsat-bb] AOP-1 Circular Polarization? > To: Amsat - BBs <amsat-bb(a)amsat.org> > Message-ID: <2D502798-0BC1-4507-98F8-C86CEF5A7590(a)bellsouth.net> > Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes > > Hello all, I'm getting ready to put back up my old AOP-1 antennas (the > old Cushcraft antennas that were popular in the days of AO-10 & 13). > I'm wondering whether I should follow the same procedure of cross > polarization for the 440 beam? It was recommended at the time to > place the antenna in an X pattern instead of the cross pattern. Also, > at the time, the 2 meter antenna was suggested to be placed in the > standard vertical/horizontal polarization. > > Please let me know which would be the best method to use for most of > today's birds. > > 73s de W4AS > > > ------------------------------

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