[amsat-bb] Re: JUGNU and SRMSAT - October 12

[Mani VU2WMY]

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 at 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.in<http://amsat.org/mailman/listinfo/amsat-bb>
>>             vu2wmy_mani at yahoo.com
>> <http://amsat.org/mailman/listinfo/amsat-bb>
>>             isrohams at  
>> yahoo.com<http://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.net<http://amsat.org/mailman/listinfo/amsat-bb>>*>>**>>**>>**>>**>>>*  
> Message: 7*>>>* Date: Mon, 26 Sep 2011 01:44:36 +0100 (BST)*>>>*  
> From: "Trevor ."<m5aka at  
> yahoo.co.uk<http://amsat.org/mailman/listinfo/amsat-bb>>*>>>* To:  
> amsat-bb at  
> amsat.org<http://amsat.org/mailman/listinfo/amsat-bb>*>>>* Subject:  
> [amsat-bb] JUGNU and SRMSAT - Ootober 12 ?*>>>*  
> Message-ID:*>>>*<1316997876.96255.YahooMailClassic at  
> web27204.mail.ukl.yahoo.com<http://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*>>>**>>>*  
> 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-university.html*>>>**>>>* 73 Trevor  
> M5AKA*


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