AO-91&92 Power Levels
Greetings all...it's been a long time since I have been active on the satellites. While I was married, I had a good station and could work nearly any satellite I could hear. After being limited to the FM birds, I had very limited success with SO-50, etc. But the Fox satellites have been simply awesome. I am having the time of my life working 91&92 with my UV5RA and 19" whip antenna. But only during the day. Do these satellites have a lower power at night/during eclipse??
John KB2HSH
On Sun, May 20, 2018, 12:24 AM amsat-bb-request@amsat.org wrote:
Send AMSAT-BB mailing list submissions to amsat-bb@amsat.org
To subscribe or unsubscribe via the World Wide Web, visit http://www.amsat.org/mailman/listinfo/amsat-bb or, via email, send a message with subject or body 'help' to amsat-bb-request@amsat.org
You can reach the person managing the list at amsat-bb-owner@amsat.org
When replying, please edit your Subject line so it is more specific than "Re: Contents of AMSAT-BB digest..."
Today's Topics:
- Recording TX & RX from one or two radios? (Bill Acito)
- Upcoming ARISS Contact Schedule as of 2018-05-19 06:00 UTC (aj9n@aol.com)
- urgent help from AMSAT members worldwide (Tanan Rangseeprom)
- Re: Recording TX & RX from one or two radios? (Bill Acito)
- Re: AMSAT-BB Digest, Vol 13, Issue 168 (Todd W Deckard)
- Re: Recording TX & RX from one or two radios? (Greene, Stephan A)
- LongJiang 1 & 2 to be launched towards the Moon (Nico Janssen)
- DSLWP Lunar Amateur Radio Mission to be Launched This Sunday
(???) 9. DSLWP Live CD Download Link Update (???) 10. AO-92 L/v active... (Andrew Glasbrenner) 11. Re: AO-92 L/v active... (Paul Stoetzer)
Message: 1 Date: Fri, 18 May 2018 20:32:46 +0000 From: Bill Acito w1pa@hotmail.com To: "amsat-bb@amsat.org" amsat-bb@amsat.org Subject: [amsat-bb] Recording TX & RX from one or two radios? Message-ID: < FR1P152MB0405D5D5ABFEB1ACC31926FF98900@FR1P152MB0405.LAMP152.PROD.OUTLOOK.COM
Content-Type: text/plain; charset="utf-8"
[[I haven't done this yet but I think others have and I plan to do it one day: most recorders are stereo. Get a *channel* splitter (I bought one on Amazon) and send radio audio to left channel, say, and an external mic to right.]]
I have been doing this for years. The key/trick is that you have to insert a 40db pad on the rig audio side because the audio levels (mic vs rig) are very different. Most audio recorders use a AGC of some sort, and with no balancing L to R, the AGC will adjust for the stronger rig audio, and lower its overall sensitivity so you won't hear the mic channel. Inserting the 40db pad balances the left and right and will give you good audio on both sides.
Bill W1PA
Message: 2 Date: Sat, 19 May 2018 02:10:58 -0400 From: aj9n@aol.com To: amsat-bb@AMSAT.Org Subject: [amsat-bb] Upcoming ARISS Contact Schedule as of 2018-05-19 06:00 UTC Message-ID: 1637705c9e3-c90-801c@webjas-vae114.srv.aolmail.net Content-Type: text/plain; charset=utf-8
Upcoming ARISS Contact Schedule as of 2018-05-19 06:00 UTC
Quick list of scheduled contacts and events:
?
Viktor Rydberg Gymnasium, Stockholm, Sweden, telebridge via K6DUE
The ISS callsign is presently scheduled to be NA1SS
The scheduled astronaut is Scott Tingle KG5NZA
Contact is a go for: Tue 2018-05-22 08:53:38 UTC 33 deg (***)
?
Janusz Kusoci?ski Primary School No. 71, Pozna?, Poland, telebridge via W6SRJ
The ISS callsign is presently scheduled to be NA1SS
The scheduled astronaut is Ricky Arnold KE5DAU
Contact is a go for: Wed 2018-05-23 11:06:52 UTC 66 deg
Watch for live stream at https://ariss.pzk.org.pl/live/??
?
ARISS is always glad to receive listener reports for the above contacts.? ARISS thanks everyone in advance for their assistance.? Feel free to send your reports to aj9n@amsat.org or aj9n@aol.com.
?
Listen for the ISS on the downlink of 145.8? MHz.
?
?
All ARISS contacts are made via the Kenwood radio unless otherwise noted.
?
Several?of you have sent me emails asking about the RAC ARISS website and not being able?to get in.? That has now been changed to? http://www.ariss.org/
Note that there are links to other ARISS websites from this?site.
Looking?for something new to do?? How about receiving DATV from the ISS??? If interested, then please go to the ARISS-EU website for complete? details.? Look for the buttons indicating Ham?Video.? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? http://www.ariss-eu.org/? ?
?
If you need some assistance, ARISS mentor Kerry N6IZW, might be able to provide some insight. ?Contact Kerry at kbanke@sbcglobal.net
ARISS congratulations the following mentors who have now mentored over 100 schools:?
Francesco IK?WGF with 132
Satoshi 7M3TJZ with 129
Gaston ON4WF with 123
Sergey RV3DR with 103
The?webpages listed below were all reviewed for accuracy.? Out of date webpages?were removed and new ones have been added.? If there are additional ARISS?websites I need to know about, please let me know.
Note, all times?are approximate.? It is recommended that you do your own orbital prediction?or start listening about 10 minutes before the listed time. All dates and?times listed follow International Standard ISO 8601 date and time format? YYYY-MM-DD HH:MM:SS
The complete schedule page has been updated as of?2018-05-19 06:00 UTC.? (***)
Here you will find a listing of all scheduled?school contacts, and questions, other ISS related websites, IRLP and?Echolink websites, and instructions for any contact that may be streamed?live.??
http://www.amsat.org/amsat/ariss/news/arissnews.rtf
http://www.amsat.org/amsat/ariss/news/arissnews.txt
Total number?of ARISS ISS to earth school events is 1228. ?? Each school counts as 1?event. Total number of ARISS ISS to earth school contacts is 1177. ? Each contact may have multiple schools sharing the same time slot. Total number of ARISS supported terrestrial contacts is?47.
A complete year by year breakdown of the contacts may be found in the file. http://www.amsat.org/amsat/ariss/news/arissnews.rtf
Please?feel free to contact me if more detailed statistics are needed.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
The?following US states and entities have never had an ARISS contact: Delaware, South Dakota, Wyoming, American?Samoa, Guam, Northern Marianas Islands, and the Virgin Islands.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
QSL?information may be found at:?? http://www.ariss.org/qsl-cards.html?
ISS callsigns:? DP?ISS, IR?ISS, NA1SS, OR4ISS,?RS?ISS
The successful school list has been updated as of 2018-05-16 07:00 UTC. ?
http://www.amsat.org/amsat/ariss/news/Successful_ARISS_schools.rtf
Frequency? chart for packet, voice, and crossband repeater modes showing Doppler? correction? as of 2005-07-29 04:00 UTC
http://www.amsat.org/amsat/ariss/news/ISS_frequencies_and_Doppler_correction .rtf
Listing?of ARISS related magazine articles as of 2006-07-10 03:30 UTC. http://www.amsat.org/amsat/ariss/news/ARISS_magazine_articles.rtf
Check out the Zoho reports of the ARISS?contacts
https://reports.zoho.com/ZDBDataSheetView.cc?DBID=412218000000020415
Exp. 54 on orbit
Scott Tingle KG5NZA
Norishige Kanai
Anton Shkaplerov
?
Exp. 55 on orbit
Drew Feustel
Oleg Artemyev
Ricky Arnold KE5DAU
73, Charlie?Sufana AJ9N One of the ARISS operation team mentors
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
Message: 3 Date: Sat, 19 May 2018 18:38:13 +0700 From: Tanan Rangseeprom nanrspm@gmail.com To: amsat-bb@amsat.org, Paul Stoetzer n8hm@amsat.org, Paul Stoetzer prstoetzer@gmail.com Subject: [amsat-bb] urgent help from AMSAT members worldwide Message-ID: <CAMw-yOXvGQJ+UmQ2bSnModcNAtH86cFPicA= W4x+pXfeF07wHg@mail.gmail.com> Content-Type: text/plain; charset="UTF-8"
Dear Paul Stoetzer, Executive Vice President of Radio Amateur Satellite Corporation (AMSAT-NA) and member of AMSAT-BB
The Radio Amateur Society of Thailand under patronage of His Majesty the King (RAST) would like to thank you for the SatPC32 program along with the Registration Code for the HS0AJ Ground Station. I and members of RAST along with the team building the JAISAT-1 satellite used your program to control the Rotor with a V/U antenna to work automatically in order to receive signals from amateur radio satellites that passed over Thailand. We have posted a video on YouTube of this, along with audio from an IC-9100 transceiver, which you can view by using the link below or by searching YouTube for the callsign HS0AJ.
https://www.youtube.com/watch?v=ldjAA6e_Pjs
We have made an application to the Thai regulator, the National Broadcasting and Telecommunications Commission (NBTC) to set up ground stations in different regions of Thailand in four locations, from North to South and with the following callsigns:
GS station in the North of Thailand, using the callsign HS0AN
GS station in the South using the callsign HS0AS
GS Station in the Northeast of Thailand using the callsign HS0AO
GS station in the Central region of Thailand with the callsign HS0AL
We intend to post videos from all of these stations on YouTube, similar to those from HS0AJ, and we will establish ground stations all over the country in order to receive signals from satellites and to enable amateur radio operators and others in Thailand who are interested to access videos from these stations on YouTube.
However, now we are seeking urgent help from AMSAT members worldwide because we are unable to contact the company Innovative Solutions In Space (ISIS) with which RAST had signed a contract to buy components for a U-class CubeSat but excluding the payload, being the Linear Transponder. Since the beginning of this year up until now we have been unable to contact ISIS, which is the reason for this appeal to you for urgent help in the purchase of components for the Flight Model of the 1U CubeSat satellite which is capable of carrying a payload of a Linear Transponder for RAST and which has been assembled and has passed the testing phase.
Can anyone please provide some recommendations to us regarding the assembly of the satellite ? and as quickly as possible? RAST and its members are lacking experience in satellite assembly and for the initial testing phase and we are appealing for suggestions as to where we can find suppliers of CubeSat components and as to who can test them and send the satellite out into space?
For your consideration, please find some YouTube links about testing and building a Linear Transponder below:
Thermal vacuum test
https://www.youtube.com/watch?v=q8gebXAaj6M
Vibration Test
https://www.youtube.com/watch?v=6e02iOwZdM8
Design PCB
https://www.youtube.com/watch?v=z61l6r1AtQo
https://www.youtube.com/watch?v=lBwMD5y3nns
https://www.youtube.com/watch?v=bSb86DushF8
https://www.youtube.com/watch?v=1fXePZ-L86M
3D of JAISAT-1 Satellites
https://www.youtube.com/watch?v=TNqO_3Q9vxo
JITTER OF LOCAL OSCILLATOR 190MHz and 390MHz
https://www.youtube.com/watch?v=IrSpHzPD-Y8
Sincerely and with respect,
Tanan Rangseeprom
Message: 4 Date: Fri, 18 May 2018 20:39:08 +0000 From: Bill Acito w1pa@hotmail.com To: "amsat-bb@amsat.org" amsat-bb@amsat.org Subject: Re: [amsat-bb] Recording TX & RX from one or two radios? Message-ID: < FR1P152MB040554B0BCE53D859BF58B8398900@FR1P152MB0405.LAMP152.PROD.OUTLOOK.COM
Content-Type: text/plain; charset="utf-8"
https://www.ebay.com/itm/Hosa-Stereo-1-8-3-5-mm-Male-to-Dual-Mono-1-8-Female...
You will likely have to build your own 40db pad ---? its two resisters.
Bill
Message: 5 Date: Sat, 19 May 2018 07:03:59 -0500 From: Todd W Deckard twdeckard@earthlink.net To: amsat-bb@amsat.org Subject: Re: [amsat-bb] AMSAT-BB Digest, Vol 13, Issue 168 Message-ID: CF4FBC12-C73A-4A69-BFF8-5B21CAFDB4AD@earthlink.net Content-Type: text/plain; charset=utf-8
mailing list bounced my pedantic response due to attached image size ...
here?s a link to a parallel thread that has the image of ISS altitude over time.
http://forums.qrz.com/index.php?threads/need-help-with-ascending-node.549308...
Sent from my iPhone
On May 19, 2018, at 6:43 AM, Todd W Deckard twdeckard@earthlink.net
wrote:
As an aside, the ISS makes an adjustment approximately once a month.
They operate at a higher altitude now that the shuttle is no longer used for resupply. Here is a plot from heavens-above.
<image1.png>
I have observed that if you are using an Arduino or another processor
with single precision math, the computed results age very quickly for any LEO and practically I must update every few days.
if you are using a more respectable math engine and are only concerned
about the orbital elements; the error in the satellite position is approximately a kilometer at the epoch of the TLE. Then the simplified perturbation model (SPG4) used by the common software we use loses about 1-2km a day.
all of this is a bit pedantic if you are hand pointing an antenna in the
noble tradition ...
best Todd Sent from my iPhone
On May 18, 2018, at 9:51 PM, amsat-bb-request@amsat.org wrote:
Send AMSAT-BB mailing list submissions to amsat-bb@amsat.org
To subscribe or unsubscribe via the World Wide Web, visit http://www.amsat.org/mailman/listinfo/amsat-bb or, via email, send a message with subject or body 'help' to amsat-bb-request@amsat.org
You can reach the person managing the list at amsat-bb-owner@amsat.org
When replying, please edit your Subject line so it is more specific than "Re: Contents of AMSAT-BB digest..." Today's Topics:
- Re: when are TLE's too old to use? (Gregory Beat)
- Re: Recording TX & RX from one or two radios? (Mark D. Johns)
- Re: when are TLE's too old to use? (skristof@etczone.com)
- FUNcube-1 mode change (Jim Heck)
- Falconsat With Wisp and Kenwood TS-200 Internal TNC (Vincenzo Mone)
- Falconsat With Wisp and Kenwood TS-200 Internal TNC (Vincenzo Mone)
- Falconsat With Wisp and Kenwood TS-200 Internal TNC (Vincenzo Mone)
- Re: Recording TX & RX from one or two radios? (skristof@etczone.com)
- Re: Recording TX & RX from one or two radios? (Ken M)
- Re: Recording TX & RX from one or two radios? (John Brier)
<mime-attachment> <mime-attachment> <mime-attachment> <mime-attachment> <mime-attachment> <mime-attachment> <mime-attachment> <mime-attachment> <mime-attachment> <mime-attachment> _______________________________________________ Sent via amsat-bb@amsat.org. AMSAT-NA makes this open forum available to all interested persons
worldwide without requiring membership. Opinions expressed
are solely those of the author, and do not reflect the official views
of AMSAT-NA.
Not an AMSAT member? Join now to support the amateur satellite program! http://www.amsat.org/mailman/listinfo/amsat-bb
Message: 6 Date: Sat, 19 May 2018 14:32:09 +0000 From: "Greene, Stephan A" stephan.a.greene@vencore.com To: John Brier johnbrier@gmail.com, Steve Kristoff skristof@etczone.com Cc: AMSAT BB amsat-bb@amsat.org Subject: Re: [amsat-bb] Recording TX & RX from one or two radios? Message-ID:
<905C3C6D2F7CC24386DD63AD6DE8D841EEFD29DF@DC7SWEXP002.corp.adroot.internal
Content-Type: text/plain; charset="us-ascii"
I think you want a "DJ splitter" cable. Typically a stereo (TRS) plug and two separate MONO output jacks, one for the left and one for the right channel. DJ's use one to monitor a track they are playing on one channel while cueing up a 2nd track in their headphones; the DJ software is configured to output to one track or the other. Use when you have a laptop or tablet with one audio output and don't want to or can't use a mixer or 2nd (USB?) audio device. Usually well-made because DJs hate equipment failures mid-gig. (and we hams hate equipment failures in mid-pass!) I have a Griffin DJ Cable and will have to test this myself. Native Instruments (Traktor) and other DJ equipment vendors sell these. $10-$12 give or take.
The use in this thread is to combine 2 signals into one input jack, while keeping them on separate tracks. Play the recording back in software like Audacity as suggested by others.
I agree the easiest approach is wire a cheap electret mic for local (Uplink) audio. If you tap audio from your uplink radio mic input, you may need to pad down the audio level to the recorder and take steps to isolate the recording line from the radio input.
The other "splitter" cable described connects left and right channels in parallel and is intended . Usually called a headphone audio splitter. You may get a mess unless you wire the plugs from your downlink and local audio to put signals on just one channel. More trouble than it is worth IMO. YMMV.
73 Steve KS1G
-----Original Message----- From: John Brier [mailto:johnbrier@gmail.com] Sent: Friday, May 18, 2018 10:52 PM To: Steve Kristoff Cc: AMSAT BB Subject: Re: [amsat-bb] Recording TX & RX from one or two radios?
Probably because I used the wrong term. It is a breakout cable. Here is what I have. Haven't used it yet, but it should work.
<url removed for berevity>
73, John Brier KG4AKV
Message: 7 Date: Sat, 19 May 2018 17:25:11 +0200 From: Nico Janssen hamsat@xs4all.nl To: AMSAT amsat-bb@amsat.org Subject: [amsat-bb] LongJiang 1 & 2 to be launched towards the Moon Message-ID: 7385fa9f-4792-b2b7-4407-fc67e77df7ab@xs4all.nl Content-Type: text/plain; charset=utf-8; format=flowed
All,
The two Chinese microsats LongJiang 1 & 2 are to be launched towards the Moon from Xichang on 2018-05-20 around 21:00 UTC. They carry radio amateur payloads with 2 m uplinks and 70 cm downlinks. Amateurs will be able to receive telemetry downlinks but will also be allowed to send telecommands for taking and downlinking pictures. There are also plans to enable FreeDV digital voice communications through these spacecraft.
The two LongJiang satellites are planned to perform formation flying in a high elliptical orbit around the Moon (300 x 9000 km). After launch it will take about 4 and a half days to reach the Moon. This GMAT script should work well for the first days after launch: https://hamsat1.home.xs4all.nl/LongJiang_NYC.script The groundstation used in this script is a random location in New York City. You can change this to your location by updating the values under the GroundStation tab in GMAT.
73, Nico PA0DLO
Message: 8 Date: Sun, 20 May 2018 02:01:24 +0800 (CST) From: ??? wmc_jx@163.com To: "amsat-bb@amsat.org" amsat-bb@amsat.org Subject: [amsat-bb] DSLWP Lunar Amateur Radio Mission to be Launched This Sunday Message-ID: 287a0b20.349.163799035a7.Coremail.wmc_jx@163.com Content-Type: text/plain; charset=GBK
Dear OMs,
DSLWP is a lunar formation flying mission led by Harbin Institute of Technology for low frequency radio astronomy, amateur radio and education. It consists of a pair of 47 kg microsatellites, to be launched into a lunar transfer orbit UTC this Sunday evening, and finally enter a 300 x 9000km lunar elliptical orbit. Onboard each satellite, there are two VHF/UHF SDR transceivers to provide beacon, telemetry, telecommand, digital image downlink and a GMSK-JT4 repeater. Onboard transmitting power is about 2 W.
The first launch window will open at about 21:30 May 20th UTC. The transmitters will be activated soon after separation. Satellite A will transmit 500 baud GMSK with 1/4 turbo code on 435.425 MHz and 250 baud GMSK with 1/2 turbo code and precoder on 436.425 MHz, and satellite B will transmit 500 baud GMSK with 1/4 turbo code on 435.400 MHz and 250 baud GMSK with 1/2 turbo code and precoder on 436.400 MHz, in every 5 minutes by default. Each transmittion will last about 16 seconds. Radio amateurs in South America will have the earliest chance to receive the signals from the satellites, then North America, Oceania, Asia, Europe and Africa.
Harbin Institute of Technology Amateur Radio Club expects radio amateurs to join in this mission. We will prepare different QSL cards for different flight phase for amateurs successfully made QSO or received telemetry. Awards will also be given to the first 10 amateurs in each continent who successfully decoded the signals from the satellites, received the most number of packets, or received an image. Your participation will also help the team to get a better knowledge of the status of the satellites.
An open source decoding software based on GNU Radio to work with RTL-SDR and USRP is provided. Not difficult to change the grc files to support other SDR receivers. A small proxy software will send the decoded data to a server for real-time display.
Thank you very much and fingers crossed for a successful launch!
Best Regards,
Wei Mingchuan BG2BHC
Links:
IARU frequency coordination page: http://www.amsatuk.me.uk/iaru/finished_detail.php?serialnum=530
Link budgets: http://lilacsat.hit.edu.cn/wp/?page_id=676
Decoder (GNU Radio OOT module): https://github.com/bg2bhc/gr-dslwp
Decoder (Linux Live CD): https://1drv.ms/u/s!Av6J6WjI3UbMhHm8gwMr4Z_keqWH
TLE: http://lilacsat.hit.edu.cn/tle/dslwp.txt
DSLWP-A Telemetry Display: http://lilacsat.hit.edu.cn/dashboard/pages_en/telemetry-a.html
DSLWP-B Telemetry Display: http://lilacsat.hit.edu.cn/dashboard/pages_en/telemetry-b.html
--
WEI Mingchuan
Research Center of Satellite Technology Harbin Institute of Technology mobile: +86-189-4501-5242 e-mail: wmc_jx@163.com; bg2bhc@gmail.com
Message: 9 Date: Sun, 20 May 2018 08:31:49 +0800 (CST) From: ??? wmc_jx@163.com To: "amsat-bb@amsat.org" amsat-bb@amsat.org Subject: [amsat-bb] DSLWP Live CD Download Link Update Message-ID: 7dea7110.12b3.1637af5a825.Coremail.wmc_jx@163.com Content-Type: text/plain; charset=GBK
Hi OMs,
If the One Drive link for DSLWP does not work, please have a try with this: https://drive.google.com/file/d/16YQ3XvQ9hLp6ckpwFj4OkxO2ONzJ8ZSw/view?usp=s...
73!
Wei BG2BHC
--
WEI Mingchuan
Research Center of Satellite Technology Harbin Institute of Technology mobile: +86-189-4501-5242 e-mail: wmc_jx@163.com; bg2bhc@gmail.com
Message: 10 Date: Sat, 19 May 2018 22:43:39 -0400 From: Andrew Glasbrenner glasbrenner@mindspring.com To: amsat-bb@amsat.org Subject: [amsat-bb] AO-92 L/v active... Message-ID: A8AE8B1B-C33F-47E9-A08C-F9C6A8ED42CB@mindspring.com Content-Type: text/plain; charset=us-ascii
Commanded on at 0235Z 20MAY and will remain active for ~24 hours. Enjoy!
73, Drew KO4MA
Message: 11 Date: Sun, 20 May 2018 00:21:01 -0400 From: Paul Stoetzer n8hm@arrl.net To: Andrew Glasbrenner glasbrenner@mindspring.com Cc: amsat-bb@amsat.org Subject: Re: [amsat-bb] AO-92 L/v active... Message-ID: <CABzOSOpwCDUB7hjkxX= Me+vAnCuh-x93sPXdaXRTiy+b6_FEKQ@mail.gmail.com> Content-Type: text/plain; charset="UTF-8"
If anyone at Hamvention wants to see portable L-band ops, stop by the demo area outside Building 1 for an 87 degree pass of AO-92 at 11:36am tomorrow.
73,
Paul, N8HM
On Sat, May 19, 2018 at 22:43 Andrew Glasbrenner < glasbrenner@mindspring.com> wrote:
Commanded on at 0235Z 20MAY and will remain active for ~24 hours. Enjoy!
73, Drew KO4MA _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership.
Opinions
expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite
program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Subject: Digest Footer
Sent via amsat-bb@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT member? Join now to support the amateur satellite program! http://www.amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 13, Issue 169
Hi John,
I'm glad you are enjoying the satellites! The power levels are not designed to change at night, although the transmitter power is dependent on the bus voltage. Since the batteries will be discharging to power the bird at night, it's possible they the power is a bit lower, but not hugely. If you are having more trouble getting IN, one suggestion is that you are competing with more stations at night. If you are having trouble hearing (which makes more sense since you are asking about Tx power) I can only suggest a change in your local QRM level is causing trouble.
73 and have fun!
Burns WB1FJ
On Sun, May 20, 2018 at 10:32 PM, John Marranca, Jr KB2HSH@amsat.org wrote:
Greetings all...it's been a long time since I have been active on the satellites. While I was married, I had a good station and could work nearly any satellite I could hear. After being limited to the FM birds, I had very limited success with SO-50, etc. But the Fox satellites have been simply awesome. I am having the time of my life working 91&92 with my UV5RA and 19" whip antenna. But only during the day. Do these satellites have a lower power at night/during eclipse??
John KB2HSH
Burns mentioned ...
If you are having trouble hearing [evening/night] (which makes more sense since you are asking about Tx power) I can only suggest a change in your local QRM level is causing trouble.
Locally I've noticed a definite step upwards in noise level at 2 meters starting at around 5:00 PM when neighbors return home from work and activate various unknown to me appliances in their home. I can see it on the SDR waterfall and also hear the increased noise ... without much change in signal strength from AO-92.
The electrical noise seems to increase an additional 50% during Christmas when the neighbors turn on their outdoor decorations.
-- 73 de JoAnne K9JKM k9jkm@amsat.org
participants (3)
-
Burns Fisher -
JoAnne K9JKM -
John Marranca, Jr