SSTV still active from ISS

 

ARISS SSTV Award

INTERNATIONAL SPACE STATION - ACTIVE SSTV

SSTV PHOTO RECEIVED @1040 UTC

NEXT DSLWP-B UHF test !!

DSLWP-B UHF test,
GMSK on 435.4, JT4G + GMSK on 436.4 this time

30 Jun 00:00 to 30 Jun 02:00,
30 Jun 05:00 to 30 Jun 07:00,
30 Jun 16:00 to 30 Jun 18:00,
1  Jul   07:00 to 1   Jul  09:00,

 all time in UTC

https://twitter.com/bg2bhc

DSLWP-B test decoding

The wav file received by  JA0CAW station.
Tested and posted at  JE9PEL, Mineo Wakita blog.
http://www.dropbox.com/s/wnyks1idlat3ppt/Mon_180616_104100.WAV
I retested DSLWP-B  audio file,  played it via Audacity software on PC  and the audio decoded by WSJT on other PC .result is ok ,but  infrequently decoded.

Fluorescence map from NASA and The Holy Quran

                                      https://www.youtube.com/watch?v=3VUZOva3PYQ&t=67s

Chapter 24 The Light - - An-Noor: Verse 35
Allah is the Light of the heavens and the earth. The Parable of His Light is as if there were a Niche and within it a Lamp: the Lamp enclosed in Glass: the glass as it were a brilliant star: Lit from a blessed Tree, an Olive, neither of the east nor of the west, whose oil is well-nigh luminous, though fire scarce touched it: Light upon Light! Allah doth guide whom He will to His Light: Allah doth set forth Parables for men: and Allah doth know all things.

Quantum and light coherence simply explained in Quran

Science Magazine

read more                     https://www.nasa.gov/topics/earth/features/fluorescence-map.html

                                     https://www.nasa.gov/jpl/oco2/pia18935

                                   https://phys.org/news/2013-07-photosynthesis-space-nasa-scientists-   satellites.html

                                  Photosynthesis-space-nasa-scientists-satellites.pdf

FALCONSAT-3 MSG

FALCONSAT-3 MESSAGES 13-06-2018

DSLWP-B’s journey to the Moon: part I

 DSLWP-B’s journey to the Moon: part I

By Daniel destevez

As you may well know, on May 20 a CZ-4C rocket launched from Xichang, China, to deliver Queqiao, the Chang’e 4 relay satellite, to the Moon. Queqiao is a communications relay satellite designed to orbit the L2 point of the Earth-Moon system, supporting the future Chang’e 4 rover that will land on the far side of the Moon. From the L2 point, Queqiao has a good view of both the Earth and the far side of the Moon.
This launch was shared by the DSLWP-A and -B microsatellites, also called Longjiang 1 and 2. These two satellites are designed to be put on a 200 x 9000km lunar orbit and their main scientific mission is a proof of concept of the Discovering the Sky at Longest Wavelengths experiment, a radioastronomy HF interferometer that uses the Moon as a shield from Earth’s interferences.

 

DSLWP-B’s journey to the Moon: part II

JT4G detection algorithm for DSLWP-B

read more  >>>>>>>>>>

Decoding DSLWP Satellite Telemetry

Decoding DSLWP Satellite Telemetry

Introduction
This material is intended to assist Windows PC users who desire to experiment in decoding the
satellites that utilize GNU Radio software for gathering telemetry data. Windows users are
targeted because that Operating System dominates the applications used by ham radio
operators and most of them do not possess a Linux PC. This guideline is intended to advise the
targeted audience on procedures for utilizing their existing Windows hardware to safely boot
the Linux operating system for purposes of running the GNU Radio SDR applications.

Red Willoughby, KC4LE
May 31, 2018

>>>>>    read more

Post-Launch Signals Received as Amateur Radio Heads to Moon

DSLWP-A / Longjiang-1

 DSLWP-B / Longjiang-2

05/21/2018 China has launched two microsatellites into a lunar transfer orbit. They launched as secondary payloads with the Quequiao relay satellite on May 20, in conjunction with the Chang’e 4 mission to the far side of the moon. Once in lunar orbit, DSLWP-A1 and DSLWP-A2 (DSLWP = Discovering the Sky at Longest Wavelengths Pathfinder) — also known as Longjiang-1 and Longjiang-2 — will test low-frequency radio astronomy and space-based interferometry. They carry Amateur Radio and educational payloads, but not a transponder. The Chang’e 4 mission will be the first-ever attempt at a soft landing on the far side of the moon.
Following deployment, signals from the DSLWP satellites were received by radio amateurs in Brazil, Chile, and the US, as well as by many others around the world. Harbin Institute of Technology (BY2HIT) developed and built the DSLWP spacecraft and is overseeing that mission. The two microsats eventually will enter a 300 × 9,000 kilometer elliptical orbit. Each satellite carries VHF/UHF SDR transceivers for beacon, telemetry, telecommand, and digital image downlink, plus a GMSK-JT4 repeater. Onboard transmitting power is about 2 W.
The astronomy objectives of the two spacecraft are to observe the sky at the lower end of the electromagnetic spectrum — 1 MHz to 30 MHz — with the aim of learning about energetic phenomena from galactic sources, using the moon to shield them from earthbound radio signals.
An open telecommand protocol on the spacecraft is designed to allow radio amateurs to send commands to take and download images. DSLWP-A1 downlinks are 435.425 MHz and 436.425 MHz; DSLWP-A2 downlinks are 435.400 MHz and 436.400 MHz. They will use 250/500 bps GMSK using 10 kHz wide FM single-channel data, with concatenated codes or JT4G. JT4 uses four-tone FSK, with a keying rate of 4.375 baud; the JT4G sub-mode uses 315 Hz tone spacing and 1,260 Hz total bandwidth.
The Queqiao communications relay satellite is required for the lunar far-side landing to facilitate communication with a not-yet-launched lander and rover because the moon’s far side never faces Earth, and some significant scientific measurements from the dark side of the moon require real-time contact with Earth. Queqiao was developed by the China Academy of Space Technology (CAST).
Harbin Institute of Technology Amateur Radio Club hopes that radio amateurs will get involved with the DSLWP mission, and QSL cards have been designed for different flight phases for amateurs who successfully receive telemetry or make contact.
 source http://www.arrl.org/

DSLWP Radio Info

DSLWP-A / Longjiang-1

BJ1SM
Downlink
Frequency
435.425 / 436.425 MHz
Antenna
2 × shortened monopole, 90° mounted
Polarization
Linear
Modulation
250/500 bps GMSK with or without precoder
JT4G
Channel Coding (for GMSK)
1/2 or 1/4 Turbo code
Randomizer (for GMSK)
CCSDS
Sync Word (for GMSK)
0x034776C7272895B0 (1/2 Turbo)
0x034776C7272895B0FCB88938D8D76A4F (1/4 Turbo)
Power
33 dBm Uplink
Frequency
VHF
Antenna
2 × shortened monopole, 90° mounted
Polarization
Linear
Channel Coding
(7, 1/2) convolutional + (255, 223) RS
Modulation
250 bps GMSK
DSSS-2FSK DSLWP-B / Longjiang-2

BJ1SN
Orbiting moon since 25 May 14:08 UTC! Downlink
Frequency
435.400 / 436.400 MHz
Antenna
2 × shortened monopole, 90° mounted
Polarization
Linear
Modulation
250/500 bps GMSK with or without precoder
JT4G
Channel Coding (for GMSK)
1/2 or 1/4 Turbo code
Randomizer (for GMSK)
CCSDS
Sync Word (for GMSK)
0x034776C7272895B0 (1/2 Turbo)
0x034776C7272895B0FCB88938D8D76A4F (1/4 Turbo)
Power
33 dBm Uplink
Frequency
VHF
Antenna
2 × shortened monopole, 90° mounted
Polarization
Linear
Channel Coding
(7, 1/2) convolutional + (255, 223) RS
Modulation
250 bps GMSK
DSSS-2FSK 

 Telemetry Decoder
Source Code and GRC flowchart based on GNU Radio
https://github.com/bg2bhc/gr-dslwp/

Tracking Files https://github.com/bg2bhc/dslwp_dev/
Linux Live CD
ISO File (20180530)
https://drive.google.com/file/d/1Ptga7XfgQ--qsnD4QhpNiRRUIW3c626L/
User Manual
https://github.com/bg2bhc/dslwp_dev/blob/master/dslwp_live_cd_user_manual_20180604.pdf
Real TIme Telemetry
http://lilacsat.hit.edu.cn/dashboard/pages_en/telemetry-a.html http://lilacsat.hit.edu.cn/dashboard/pages_en/telemetry-b.html
VLBI
First test on 10 Jun 2018
Data from Beijing 12m dish https://drive.google.com/file/d/1I4N9-1FYAYp8YRuI_WW49Hud1-vvDF4k
Data from Dwingeloo 25m dish https://charon.camras.nl/public/dslwp-b/

Here is a collection of configurations of radio amateurs who have successful DSLWP downlink reports.

LilacSat

 http://lilacsat.hit.edu.cn/wp/?page_id=844