[amsat-bb] CAPE-2 news
Hello my friends ! The pass over western Europe of orbits between 204 and 308 (this last yesterday) were well received, especially the CW telemetry (decoded by ears :-) because of its interesting sound). This morning, during orbit 323 pass (AOS 0732 UTC here) a continuous carrier alone was heard, slowly frequency modulated at the rate of the satellite rotation due to the voltage variation with no battery available : period 4 seconds, amplitude 850 Hz. Better, have a look here : http://f5yg.pagesperso-orange.fr/forum/CAPE-2_orb323_11dec2013.mp3 http://f5yg.pagesperso-orange.fr/forum/CAPE-2_orb323_11dec2013.jpg Have a nice day, everyone ! 73 ! Jean-Pierre/F5YG -- Powered by Linux (Slackware 10.0 - kernel 2.4.26) ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: CAPE-2 news
On the next pass, orbit 324, was received (but not decoded) AX25 frames with the same 850 Hz in 4 seconds variation of the central frequency, one frame each 15 secondes. But the bird is alive ! 73 ! Jean-Pierre/F5YG -- Powered by Linux (Slackware 10.0 - kernel 2.4.26) On Wed, 11 Dec 2013, Jean-Pierre Godet wrote: Hello my friends ! The pass over western Europe of orbits between 204 and 308 (this last yesterday) were well received, especially the CW telemetry (decoded by ears :-) because of its interesting sound). This morning, during orbit 323 pass (AOS 0732 UTC here) a continuous carrier alone was heard, slowly frequency modulated at the rate of the satellite rotation due to the voltage variation with no battery available : period 4 seconds, amplitude 850 Hz. Better, have a look here : http://f5yg.pagesperso-orange.fr/forum/CAPE-2_orb323_11dec2013.mp3 http://f5yg.pagesperso-orange.fr/forum/CAPE-2_orb323_11dec2013.jpg Have a nice day, everyone ! 73 ! Jean-Pierre/F5YG ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: CAPE-2 news
Yes, it's still alive, see http://www.dk3wn.info/p/?p=39410 I decoded almost 11 packet frames! Regards from Spain, EA1JM, Fran -Mensaje original- De: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] En nombre de Jean-Pierre Godet Enviado el: miércoles, 11 de diciembre de 2013 10:22 Para: amsat-bb@amsat.org CC: amsa...@yahoogroups.com Asunto: [amsat-bb] Re: CAPE-2 news On the next pass, orbit 324, was received (but not decoded) AX25 frames with the same 850 Hz in 4 seconds variation of the central frequency, one frame each 15 secondes. But the bird is alive ! 73 ! Jean-Pierre/F5YG -- Powered by Linux (Slackware 10.0 - kernel 2.4.26) On Wed, 11 Dec 2013, Jean-Pierre Godet wrote: Hello my friends ! The pass over western Europe of orbits between 204 and 308 (this last yesterday) were well received, especially the CW telemetry (decoded by ears :-) because of its interesting sound). This morning, during orbit 323 pass (AOS 0732 UTC here) a continuous carrier alone was heard, slowly frequency modulated at the rate of the satellite rotation due to the voltage variation with no battery available : period 4 seconds, amplitude 850 Hz. Better, have a look here : http://f5yg.pagesperso-orange.fr/forum/CAPE-2_orb323_11dec2013.mp3 http://f5yg.pagesperso-orange.fr/forum/CAPE-2_orb323_11dec2013.jpg Have a nice day, everyone ! 73 ! Jean-Pierre/F5YG ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: CAPE-2 news
Thanks Jean-Pierre The mp3 was corrupted could you please resent the file Thanks nick ARS K5QXJ EM30xa 30.1N 92.1W Office 337 593 8700 Cell 337 258 2527 Helping UL become a world Class Engineering and Educational School -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Jean-Pierre Godet Sent: Wednesday, December 11, 2013 2:35 AM To: amsat-bb@amsat.org Cc: amsa...@yahoogroups.com Subject: [amsat-bb] CAPE-2 news Hello my friends ! The pass over western Europe of orbits between 204 and 308 (this last yesterday) were well received, especially the CW telemetry (decoded by ears :-) because of its interesting sound). This morning, during orbit 323 pass (AOS 0732 UTC here) a continuous carrier alone was heard, slowly frequency modulated at the rate of the satellite rotation due to the voltage variation with no battery available : period 4 seconds, amplitude 850 Hz. Better, have a look here : http://f5yg.pagesperso-orange.fr/forum/CAPE-2_orb323_11dec2013.mp3 http://f5yg.pagesperso-orange.fr/forum/CAPE-2_orb323_11dec2013.jpg Have a nice day, everyone ! 73 ! Jean-Pierre/F5YG -- Powered by Linux (Slackware 10.0 - kernel 2.4.26) ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: why not to buy an M2 antenna
Dave, My times technologies T100 says the switching block failed. I am not worried about cosmetics. Cosmetics don't get grid squares. Have fun, Norm n3ykf On Tue, Dec 10, 2013 at 3:46 PM, David Metz davem...@machlink.com wrote: The damage shown in the photos is simply the plastic (my guess is it is Delrin) breaking down from UV exposure. Back in the 80's I built my own circular polarized antennas for 70cm and 2M for AO-13. Having a lathe I made some parts from white Delrin (a nylon like material). After about ten years it showed the same UV damage. Note that the black plastic element insulators in the photos are not cracked. The black pigment used in the element insulators apparently protects them from UV. After learning this lesson I started using the black Delrin for my home brew antennas and have had no problems with UV damage. All that said, some plastics are more resistant to UV than others. I have two M2 antennas in use for terrestrial use and after ten years of being up in the elements they are both working well. Note that the UV damage may not have gone all the way to the core of the component yet. If it is still mechanically intact (and just looks awful), it can be salvaged by coating it with a thick black sealant and covering that with black electrical tape. --73-- Dave WA0AUQ ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: CAPE-2 news
You are right, Nick. I apologize for the inconvenience. Now it's OK through the same link : http://f5yg.pagesperso-orange.fr/forum/CAPE-2_orb323_11dec2013.mp3 It was orbite nr 323, the next ones, 324 and 325, was OK with AX25 telemetry each 15 seconds. 73 ! Jean-Pierre F5YG -- Powered by Linux (Slackware 10.0 - kernel 2.4.26) On Wed, 11 Dec 2013, Nick Pugh K5QXJ wrote: Thanks Jean-Pierre The mp3 was corrupted could you please resent the file Thanks nick ARS K5QXJ EM30xa 30.1N 92.1W Office 337 593 8700 Cell 337 258 2527 Helping UL become a world Class Engineering and Educational School -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Jean-Pierre Godet Sent: Wednesday, December 11, 2013 2:35 AM To: amsat-bb@amsat.org Cc: amsa...@yahoogroups.com Subject: [amsat-bb] CAPE-2 news Hello my friends ! The pass over western Europe of orbits between 204 and 308 (this last yesterday) were well received, especially the CW telemetry (decoded by ears :-) because of its interesting sound). This morning, during orbit 323 pass (AOS 0732 UTC here) a continuous carrier alone was heard, slowly frequency modulated at the rate of the satellite rotation due to the voltage variation with no battery available : period 4 seconds, amplitude 850 Hz. Better, have a look here : http://f5yg.pagesperso-orange.fr/forum/CAPE-2_orb323_11dec2013.mp3 http://f5yg.pagesperso-orange.fr/forum/CAPE-2_orb323_11dec2013.jpg Have a nice day, everyone ! 73 ! Jean-Pierre/F5YG -- Powered by Linux (Slackware 10.0 - kernel 2.4.26) ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: why not to buy an M2 antenna Sealing Coax
On Tue, Dec 10, 2013 at 04:40:26PM -0800, Glen Zook wrote: The cheap stuff congeals into a waterproof mass after a few days in the sun. More expensive tape often comes loose. One does have to cut through the mass to remove the tape. I have removed this tape from antennas that have been several hundred feet in the air, for decades, and, when removed, the connector looked just like it did when new! Glen, K9STH What I think is fun about the rubber self-amalgamating tape, is when you cut it off if you've put it on right you can see all the manufacturer's engraving on the connectors in relief in the rubber ;-) -- Gordonjcp MM0YEQ ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: General Telemetry Question (PITFALL!)
To follow up on Bob's comment. If you send the raw analog sensor data... Change calibration values if found to be wrong after launch... We did on PCSAT! Caution to Satellite Builders: Be careful when using an EXCEL TREND LINE equation for doing Engineering Unit conversion back to original units. It was a big lesson for us back on PCSAT in 2001. The problem is, generally, EXCEL displays trend line equations in a nice GENERAL human readable form. For example, for our thermistors, the 3rd order trend line equation to convert from telemetry count back to degrees C was displayed by EXCEL as something like this: 2E-7 X^3 - 2E-4 X^2 + 1.804E-1 X + 2.379E2. One would think one is getting a very precise to 4-significant digit equation. WRONG. Notice the Cubed and Squared terms (which can be very big at warmer temperatures) are only represented to a single decimal digit(+/- 10%)!!! (2 and 2)... When this trend line is used (as displayed), to give back our temperatures from the incoming COUNT, the temperatures were way off! The key is to make sure the trend line equation is displayed in SCIENTIFIC format before you write it down and then try to use it. Then the first two terms above are properly displayed by EXCEL as 1.544E-7 X^3 and -2.069E-4 X^2. (instead of 2E-7 and 2E-4). We catch this error in a lot of student's work... Bob, WB4APR ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: General Telemetry Question (PITFALL!)
I have been using the free program CurveExpert for years for plotting and calculating calibration data. That is, for deriving the cal equation from test data. http://www.curveexpert.net/ It lets you choose linear or quadratic and if quadratic you can pick how many terms you want. It lets you very quickly experiment with the form of the formula so you can see how to get the best fit. It also will suggest the highest exponential value for the formula. I generally build my table of test data, ADC counts vs measured values (V, I, temp, etc.), in Excel. Then I copy and paste that table into Curve Expert, click one button to make it fit the curve and another to show me the coefficients of the formula. I copy and past those back into Excel next to the table. Then I add another column to the table with values calculated using the formula and coefficients. That's the double check to be sure the formula is correct. Of course you can also see the standard deviation and other 'goodness' values in the CurveExpert data. But I find I can tell by just looking at the fit plot if I got the data wrong or my measurements weren't precise enough. I find CurveExpert much easier to use and much more flexible than Excels' curve fitting functions. Jim On 12/11/2013 11:43 AM, Robert Bruninga wrote: To follow up on Bob's comment. If you send the raw analog sensor data... Change calibration values if found to be wrong after launch... We did on PCSAT! Caution to Satellite Builders: Be careful when using an EXCEL TREND LINE equation for doing Engineering Unit conversion back to original units. It was a big lesson for us back on PCSAT in 2001. The problem is, generally, EXCEL displays trend line equations in a nice GENERAL human readable form. For example, for our thermistors, the 3rd order trend line equation to convert from telemetry count back to degrees C was displayed by EXCEL as something like this: 2E-7 X^3 - 2E-4 X^2 + 1.804E-1 X + 2.379E2. One would think one is getting a very precise to 4-significant digit equation. WRONG. Notice the Cubed and Squared terms (which can be very big at warmer temperatures) are only represented to a single decimal digit(+/- 10%)!!! (2 and 2)... When this trend line is used (as displayed), to give back our temperatures from the incoming COUNT, the temperatures were way off! The key is to make sure the trend line equation is displayed in SCIENTIFIC format before you write it down and then try to use it. Then the first two terms above are properly displayed by EXCEL as 1.544E-7 X^3 and -2.069E-4 X^2. (instead of 2E-7 and 2E-4). We catch this error in a lot of student's work... Bob, WB4APR ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] CAPE-2 responds to commands over Brazil
Please see here: http://www.qsl.net/py4zbz/cape.htm#b 73 de Roland PY4ZBZ ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] WRAPS - Portable Rotator System
Nice article by Mark Spencer WA8SME in the January, 2014 issue of QST on building a portable az-el rotator system for tracking the birds. Available to ARRL members online at ... http://www.arrl.org Clint K6LCS -- Clint Bradford, K6LCS http://www.clintbradford.com ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: WRAPS - Portable Rotator System
Hi! You can also see a video of Mark WA8SME talking about the WRAPS rotator at the 2013 AMSAT Symposium a few weeks ago in Houston: http://www.youtube.com/watch?v=K5Xx6K7tM0Y 73! Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/ On Wed, Dec 11, 2013 at 1:26 PM, Clint Bradford clintbra...@earthlink.netwrote: Nice article by Mark Spencer WA8SME in the January, 2014 issue of QST on building a portable az-el rotator system for tracking the birds. Available to ARRL members online at ... http://www.arrl.org Clint K6LCS -- Clint Bradford, K6LCS http://www.clintbradford.com ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] SatPC32 ISS help needed
HI I cannot seem to get the ISS portion of the program to operate properly with FT-847 1.Regular SatPC32 program works as it should 2.In ISS, I have CAT control (trigger on/off with C 3.SAT on the radio is turned off 4.In CAT, I can select the pair for the repeater and the downlink freg will appear on the radio (VFO A) The initial freq in the program appears but does not update further 5. Manual says With the Yaesu FT-847 only use the 'TX' / 'RX' controls of SatPC32ISSto switch the radio to TX or RX, rsp. Otherwise the VFO can't be tuned to the TX frequency before the radio is switched to TX. Program is not displaying TX/RX buttons or controls nor am I able to key tx with + or - keys on 10 key pad 6.FYI, there are no files shown in any o the aux files. (but, I suspect that info is pulled from the main program) I must have something set wrong. Any help appreciated 73, Ted K7TRK ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Trouble with ISS
NASA scaled back ops aboard the ISS today, as a cooling pump that circulates ammonia outside the station to keep equipment cool failed. NASA is still trying to figure out what exactly failed, and how to repair it. An EVA is not out of the question. NASA also stated that the ISS crew was not in danger at this time. Watch your normal news sources for more details. Clint ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Details Of ISS Cooling System Problems
http://www.nasaspaceflight.com/2013/12/iss-suffers-coolant-loop-issue-spacewalks-possible/ 73s Bernhard VA6BMJ @ DO33FL ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] CAPE-2 Ground Station Lite Edition Software Major Update!
Greetings All, Following the great success of our preliminary versions of our CAPE-2 Ground Station Software, I have just released Beta Version 1.1.1, which opens up the ability to send a new slew of commands. New Commands are listed below. - Update Clock - Set Green Mode - Send Text to Speech (Voice Options: Perfect Paul, Darth Vader, Big Bob, Precise Pete, Richochet Randy, Biff, Skip, Alvin the Chipmunk, Robo Robert, Goliath, and Gretchen) - Operate Voice Repeater - Send Emails via CAPE-2 I also made some design changes to the software to make everything much more user friendly, and secure. I am also adding a few additions to the Getting Started Guide on the software's pagehttp://ulcape.org/cape-2-ground-station-software-lite-edition/. Please review the new information before diving in. We are most interested in results from the email command at current. So please try to send yourself an email from CAPE-2! Link: http://ulcape.org/cape-2-ground-station-software-lite-edition/ As always, please direct questions, comments, and concerns to me at riz...@digitalphoenixproductions.com Thanks! Rizwan Merchant Notice of Confidentiality This E-mail is covered by the Electronic Communications Privacy Act, 18 U.S.C. §§ 2510-2521 and is legally privileged. This information is confidential information and is intended only for the use of the individual or entity named above. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. This email communication contains private and confidential information that is intended for the specific recipient, if you have received this communication in error please contact the sender immediately by phone or email to be removed from the contact list and please destroy all contents immediately. ___ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
