HAMSAT II – Dhruva Space and AMSAT India

Signing of memorandum of understanding for HAMSAT II - Credit AMSAT India

Signing of memorandum of understanding for HAMSAT II – Credit AMSAT India

The Economic Times report Dhruva Space, a two-year-old start-up co-founded by space technologist and ham radio operator Sanjay Nekkanti VU3ISS/AB3OE, sealed a deal with AMSAT India on November 30, 2014 to develop HAMSAT II.

VUsat-OSCAR-52_HAMSAT

HAMSAT I – VO-52 – was a very popular amateur radio satellite

It will be the successor to HAMSAT VO-52 which went silent on July 11, 2014 due to the failure of the on-board lithium ion batteries. HAMSAT provided a valuable communications resource for the amateur radio community for over 9 years.

Dhruva’s satellites are expected to be launched on ISRO’s workhorse Polar Satellite Launch Vehicle (PSLV). Nekkanti said his team is working closely with the space organization for design approvals and testing of the satellite.

The AMSAT India Secretary Nitin Muttin, VU3TYG has released this statement:

We are pleased to announce that AMSAT India and Dhruva Space Pvt. Ltd. have signed a Memorandum of Understanding on November 30th 2014 to pursue the development of a follow up mission to HAMSAT launched in 2005 on-board the PSLV-C6. HAMSAT II is envisioned to fill the gap created by the recent end of life of HAMSAT and shall continue servicing the societal needs in disaster management, amateur/emergency radio communications and education.

Some of the contemplated payloads for HAMSAT II include:
• U/V Analog FM Transponder
• U/V Linear Transponder, 50 kHz
• APRS Digipeater
• Digitalker

Read The Economic Times article at
http://economictimes.indiatimes.com/articleshow/45354501.cms

AMSAT India http://amsatindia.org/

Thanks to Dinesh, AB3DC for the above information.

AMSAT-India VO-52 satellite completes eight years in orbit

HAMSAT VO-52

HAMSAT VO-52

On Sunday, May 5, 2013 AMSAT-India’s VO-52 completed 8 years in orbit. During this time it has proved to be a valuable communications resource for the amateur radio community.

Mani, VU2WMY, posted this on the AMSAT Bulletin Board:

It gives us great and immense pleasure to say that ‘HAMSAT VO-52’ completes eight fruitful years in orbit contributing to the wonderful cause of ‘Amateur Radio Satellite Communication’.

The overall health parameters are excellent and we do hope that transponder(s) on-board ‘HAMSAT VO-52’ would continue to render good services for many more years to come.

On this joyous occasion,on behalf of everyone here in ISRO/India and on my personal behalf, I thank each and every user, contributors and well wishers for this great achievement.

Special thanks to Guru VU2GUR, Nitin VU3TYG, Partha VU2GPS,Sunil VU2UKR,Bob W7LRD, Trevor M5AKA and others for sending in their reports and suggestions for the possible HAMSAT 2.

73 es good wishes de

Mani, VU2WMY
Secretary & Station-In-Charge
Upagrah Amateur Radio Club VU2URC
ISRO Satellite Centre

How to make contacts through the VO-52 satellite
https://amsat-uk.org/beginners/how-to-work-the-ssb-satellites/

Getting started on Amateur Radio satellites
https://amsat-uk.org/beginners/radcom-getting-started-on-satellites/

2005 – HAMSAT launch was 100% successful
http://www.southgatearc.org/news/may2005/hamsat_update2.htm

AMSAT-India http://www.amsatindia.org/

AMSAT-India Thanks You

Dear Friends,

I take this opportunity to sincerely thank each and every user and well wishers, who have been following and monitoring closely all those events and activities that followed since the interruption on 28th February 2012.

Thanks for all those encouraging and supporting expressions!

VO-52 on FUNcube Dongle by Dave G4DPZ

VO-52 received on an AMSAT-UK FUNcube Dongle by Dave Johnson G4DPZ 17:27 pass on March 14, 2012

The initial telemetry reports indicated all the crucial and critical parameters to be normal and satisfactory and we do hope ‘HAMSAT VO-52’ would be available with much stronger power. The overall spacecraft health is in ‘Excellent Condition’ and all that we need to do is to monitor the transponder parameters.

14:05 UT on 14 March was a moment of great satisfaction and joy to all of us here in bringing ‘HAMSAT VO-52’back to life. It also gives us great pleasure to note that ‘HAMSAT VO-52’from India/ISRO has a earned a name in the history of ‘Amateur Radio Satellites’.

On behalf of everyone, I take this opportunity to sincerely thank particularly, Mr. Parimalarangan-Operations Director for his hard work and great efforts besides his exemplary technical competence and skills exhibited in recovering back ‘HAMSAT VO-52’.

Also my sincere thanks to Mission Director Mr. R. Suresh and the entire ‘HAMSAT VO-52’ Mission Management and Project teams for all the support, encouragement and recognition provided to ‘Amateur Radio World’.

My Good wishes to VO-52 and the transponders on-board for a ‘Healthy and Long Life’.

My Good wishes & Greetings, once again to William PE1RAH.

73

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@isac.gov.in
vu2wmy_mani@yahoo.com
isrohams@yahoo.com

The new HAMSAT (VO-52) frequencies are:

Uplink:         435.2250 – 435.2750 MHz SSB/CW
Downlink:     145.9250 – 145.8750 MHz SSB/CW
Beacon:       145.8600 MHz CW

How to work the SSB satellites http://www.uk.amsat.org/2712

HAMSAT VO-52 Dutch Transponder Activated http://www.uk.amsat.org/5755

HAMSAT VO-52 Activation Planned For Wednesday http://www.uk.amsat.org/5685

HAMSAT VO-52 Falls Silent http://www.uk.amsat.org/5217

AMSAT Bulletin Board (AMSAT-BB) http://www.amsat.org/amsat-new/tools/maillist/

HAMSAT VO-52 Dutch Transponder Activated

VO-52 on FUNcube Dongle by Dave G4DPZ

VO-52 received on an AMSAT-UK FUNcube Dongle by Dave Johnson G4DPZ during the 17:27 pass on March 14, 2012

The Dutch SSB/CW linear transponder on the AMSAT-India amateur radio satellite HAMSAT VO-52 has been successfully activated.

Transponder # 1, which had been operating for over 6 years, fell silent on February 28 and efforts have been underway to activate transponder # 2.

Mani VU2WMY reports that the commands to ‘Turn On’ the transponder # 2 on-board HAMSAT VO-52 were successfully sent on March 14 during the 1400 UT 35 deg ascending Node pass over Bangalore, India.

The commands were successful and the CW message beacon of the Dutch transponder # 2, built by William Leijenaar PE1RAH, was heard in Bangalore loud and clear, some 6 years and 4 months since it was last switched on.

The Dutch SSB/CW transponder uses these frequencies:
Uplink:         435.2250 – 435.2750 MHz SSB/CW
Downlink:     145.9250 – 145.8750 MHz SSB/CW
Beacon:       145.8600 MHz CW

When working through linear transponder satellites such as VO-52 use as little power as possible, this will help extend the lifetime of the transponder and satellite batteries. As a guide ensure your downlink signal is no stronger than the satellite beacon. Low duty cycle modes such as SSB and CW are recommended.

How to work the SSB satellites such as VO-52 http://www.uk.amsat.org/2712

AMSAT-India Thanks You http://www.uk.amsat.org/5777

HAMSAT VO-52 Activation Planned For Wednesday http://www.uk.amsat.org/5685

HAMSAT VO-52 Falls Silent http://www.uk.amsat.org/5217

Leijenaar Electronics http://www.leijenaarelectronics.nl/

AMSAT-India http://www.amsatindia.org/

HAMSAT VO-52 Activation Planned For Wednesday

HAMSAT VO-52

HAMSAT VO-52

Mani VU2WMY reports that due to ‘Operational Constraints’ the commands to turn on the Dutch SSB/CW transponder on HAMSAT (VO-52) could not be sent on Tuesday and attempts at 01:44 UT and 03:20 UT Wednesday were unsuccessful.

The next attempt will be made during the 14:00 UT pass over India.

William Leijenaar PE1RAH, designer and builder of the Dutch SSB/CW linear transponder on HAMSAT (VO-52), requests reports when the transponder is activated. He says:

! ! !  Please don’t use high uplink powers !!! (We don’t want it to rise temperature very fast just after cold switch on) ! ! !

Please listen for the CW beacon at 145.860, which is a good reference.
(Audio records and reports are very welcome at ISRO and myself)

73 de PE1RAH,
William Leijenaar

The frequencies used will be:

Uplink:         435.2250 – 435.2750 MHz SSB/CW
Downlink:     145.9250 – 145.8750 MHz SSB/CW
Beacon:       145.8600 MHz CW

How to work the SSB satellites http://www.uk.amsat.org/2712

HAMSAT VO-52 Falls Silent http://www.uk.amsat.org/5217

Leijenaar Electronics http://www.leijenaarelectronics.nl/

AMSAT-India http://www.amsatindia.org/