Soyuz-2.1b/Fregat - Ionosfera-M 3&4 - Vostochny - 25 July 2025 (05:54 UTC)

[K4KDR]

Thank you so much for the reply!

Clearly there are IoT/LoRaWAN downlinks being transmitted from some object (or objects) that were deployed from this launch, so we will have to just continue monitoring to determine the source(s).

We have over 100 decodes in the tinyGS database now that ground stations are listening for this signal world-wide. That should make it easier to correlate to one or more satellites.

Thanks again for the assist! As always, this will get easier as the spacecraft from this deployment spread out.

-Scott, K4KDR

[PE0SAT]

Hi Scott,

From a couple of days ago, GEOSCAN-4 and also a LoRA signal at the same/similar freq from a different object.

Jan | PE0SAT

[geoscan]

Looking at the identification table. This object may be one of the Astroline satellites or Nahid 2. Currently they have random object given to them in tinygs

[geoscan]

Info from tinygs

Satellite Name	Mode	Bandwidth	Frequency	Possible NORAD
Astroline-1	LoRa	125 kHz	436.865 MHz	?
Astroline-2	LoRa	125 kHz	436.365 MHz	?
Astroline-3	LoRa	125 kHz	435.865 MHz	?
Astroline-4	LoRa	125 kHz	435.365 MHz	?
CSTP-4.1	LoRa	62.5 kHz	436.734 MHz	64888
CSTP-4.2	LoRa	62.5 kHz	436.162 MHz	64887
CSTP-4.3	LoRa	62.5 kHz	436.162 MHz	64886
CSTP-4.4	LoRa	62.5 kHz	437.326 MHZ	64889

[geoscan]

NORAD identification	Satellite Name	Possible satellites based on the tinygs and deployment schedule
64876	IONOSFERA-M 3
64877	IONOSFERA-M 4
64878	INNOSAT 16 (RS92S7)
64879	GEOSCAN 6 (RS92S6)
64880	GEOSCAN 1 (RS92S1)
64881	239ALFEROV (RS61S)
64882	OBJECT G	Astroline-N
64883	OBJECT H	Astroline-N
64884	OBJECT J	Astroline-N
64885	OBJECT K	Astroline-N
64886	OBJECT L	CSTP-4.3
64887	OBJECT M	CSTP-4.2
64888	OBJECT N	CSTP-4.1
64889	OBJECT P	CSTP-4.4
64890	GEOSCAN 2 (RS92S2)
64891	GEOSCAN-5 (RS92S5)
64892	GEOSCAN-4 (RS92S4)
64893	GEOSCAN 3 (RS92S3)
64894	INNOSAT 3 (RS92S0)
64895	OBJECT V	Nahid-2

[geoscan]

Frequency corrections

Satellite	Actual Frequency
239Alferov	436.2723
GEOSCAN-1	435.9735
GEOSCAN-2	436.163
GEOSCAN-3	435.7423
GEOSCAN-4	435.3385
GEOSCAN-5	436.6632
GEOSCAN-6	436.9389
InnoSat3	436.4373
InnoSat16	435.8265

[pe2bz]

64883, object H, 62.5 kHz, lora ? 437.162 and 64895, object V, 62.5 kHz lora ? 436.725 both confirmed in 3 passes. Going to add suggestions for these in the DB

[EU1SAT]

64883 looks like CSTP-4.3
64895 looks like CSTP-4.4

[pe2bz]

Thanks, they appeared as Objects in the strf but the frequencies indeed do match, thanks for your reply . Added the suggestions .