Hi Bill, As per the information I have, that 10mw is only on beacon mode and it will change over to high power mode on command for payload down link.
Mani VU2WMY
Quoting Bill Ress bill@hsmicrowave.com:
Hi Sanjay,
Thanks for the clarifications.
Best of luck with the upcoming launch and do let us know any additional details you might get concerning latest launch estimates, downlink telemetry format, Pout (10 mW was mentioned but not sure if this is accurate), and when the web site gets up and running.
Regards...Bill - N6GHz
On 10/4/2011 12:35 AM, Sanjay Srikanth Nekkanti wrote:
Hi Bill,
The ground station paper was written before the frequencies were coordinated by IARU. As mentioned by Mr. Mani the downlink frequency is 437.425 Mhz.
Apparently the srmsat website is down for the past couple of months. The web-team is trying to get the website operational.
73
AB3OE,
Sanjay Srikanth Nekkanti
Erasmus Mundus Space Master (2012), Department of Space Science Luleå University of Technology Rymdcampus 1 SE-981 92, Kiruna, Sweden.
Ph : +46738016907
Hi Bill and Dinesh,
I was a part of the ISRO team that conducted the Thermal Vacuum, vibration and other environmental tests for both Jugnu and SRMSat.
I was able to receive the signals from both the satellites, while they were here in my cetre during the above mentioned test. I even used Funcube Dongle to receive and decode the telemetry CW data.
Frequencies:
SRMSat: Payload down link and CW Beacon on the same frequency - 437.425 (10dbm) Jugnu: CW Beacon - 437.275 (17dbm) Pay load - 437.505
73 de
Mani, VU2WMY Secretary& Station-In-Charge Upagrah Amateur Radio Club VU2URC ISRO Satellite Centre HAL Airport Road, Bangalore-560 017. Phone:(O)91-80-25082054/2598/2192 Mobile: 91-80-98803 41456 E-mail ID: wmy at isac.gov.inhttp://amsat.org/mailman/listinfo/amsat-bb vu2wmy_mani at yahoo.com http://amsat.org/mailman/listinfo/amsat-bb isrohams at yahoo.comhttp://amsat.org/mailman/listinfo/amsat-bb
Quoting Bill Ress<bill at hsmicrowave.com http://amsat.org/mailman/listinfo/amsat-bb>:
- Hi Dinesh,*>**>* Perhaps some clarifications are in order.*>**>*
The IARU has frequency coordinated SRMSAT at 437.425MHz for the down *>* link with no mention of coordination of the uplink. The link you *>* provided says the downlink is 434.5 MHz which puts it outside the *>* 435-438 MHz satellite band. Additionally, it mentions an uplink at *>* 145.8 MHz. right at the lower edge of the 145.8 to 146 MHz satellite *>* band.*>**>* The referenced web site, www.srmsat.in, is not functional, so recent *>* information is not available there. Do you have any other reference *>* links?*>**>* Regards...Bill - N6GHz*>**>**>**>* On 10/3/2011 7:54 AM, Dinesh Cyanam wrote:*>>* Sanjay Srikanth Nekkanti, AB3OE, confirmed that SRMSAT has passed all the*>>* required tests and is now at ISRO's spaceport, Sriharikota, ready for the*>>* Oct 12th launch.*>>* The downlink and ground station details for SRMSAT can be found on AB3OE's*>>* page here:*>>* http://srmuniv.academia.edu/SSN/P
apers/149827/Ground_Station_Design_for_a_Nano_Satellite*>>**>>* At the moment, I have no information about JUGNU. Will keep you all posted*>>* as and when I get more details.*>>**>>* 73*>>* Dinesh Cyanam*>>* KC2YQJ<dinesh at cyanam.nethttp://amsat.org/mailman/listinfo/amsat-bb>*>>**>>**>>**>>**>>>* Message: 7*>>>* Date: Mon, 26 Sep 2011 01:44:36 +0100 (BST)*>>>* From: "Trevor ."<m5aka at yahoo.co.ukhttp://amsat.org/mailman/listinfo/amsat-bb>*>>>* To: amsat-bb at amsat.orghttp://amsat.org/mailman/listinfo/amsat-bb*>>>* Subject: [amsat-bb] JUGNU and SRMSAT - Ootober 12 ?*>>>* Message-ID:*>>>*<1316997876.96255.YahooMailClassic at web27204.mail.ukl.yahoo.comhttp://amsat.org/mailman/listinfo/amsat-bb>*>>>* Content-Type: text/plain; charset=utf-8*>>>**>>>* JUGNU is listed on Gunters Space page with a possible launch date of*>>>* October 12. It's beacon frequency is given as 435.68 MHz*>>>**>>>* JUGNU Frequency*>>>* http://www.iitk.ac.in/me/jugnu/freq_coord.htm*%3E%3E%3E**%3E%3E%3E* SRM SAT is listed as being on the same launch and is understood to have a 2m*>>>* control uplink and 70cm downlink.*>>>**>>>* SRM University Ham Exam*>>>**>>>* http://chennaihams.blogspot.com/2010/03/asol-exam-conducted-at-srm-universit... 73 Trevor M5AKA*
------------------------------------------------------------------------------ Confidentiality Notice: This e-mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. ------------------------------------------------------------------------------