Archive - Dec 30, 2015
ISS Radio Report
Summary of 4 passes on 30th December 2015 excluded one pass
On the 30th December the ISS data packet transmissions was listened for from 15.11 to 15.19 at 780 Miles from London. The 10 degrees above horizon window was three minutes from 15.13 to 15.15.30. Listening was on 145.825. The period 15.11 to 15.13.40 was noise only at the time of data packets. There was some data discrimination from 15.13.40 through least distance perpendicular to the pass at 15.14. Some reception was determined to 15.16. After 15.16 to 15.19 mainly squelch noise and no data discernable.
Distant pass 780 Miles NW to SE over Spain reduced data window
On the 30th December the ISS data packet transmissions was listened for from 15.11 to 15.19 at 780 Miles from London. The 10 degrees above horizon window was three minutes from 15.13 to 15.15.30. Listening was on 145.825. The period 15.11 to 15.13.40 was noise only at the time of data packets. There was some data discrimination from 15.13.40 through least distance perpendicular to the pass at 15.14. Some reception was determined to 15.16. After 15.16 to 15.19 mainly squelch noise and no data discernable.
Quality of data packets change from pass to pass due to antenna positions and distances 30th Dec 2015
The pass to from the NW to SE was weaker and more noisy for shorter period of 13.37 to 13.40 hours on 145.825 possibly due to position shading of vertical ground antenna compared to earlier clear pass in morning. Again the approaching ISS had poorer signal than departing ISS.
73's for 2016
M0TCE
13.35 to 13.43 pass by London data signal shorter period 13.37 to 13.40 Dec 30th 15
The pass to from the NW to SE was weaker and more noisy for shorter period of 13.37 to 13.40 hours on 145.825 possibly due to position shading of vertical ground antenna compared to earlier clear pass in morning. Again the approaching ISS had poorer signal than departing ISS.
73's for 2016
M0TCE
ISS Radio Report
ISS Radio Report
Direct overpass of London was poorer data reception than pass to the South of London
From 11.58 am to 12.08 am there was squelch generation with the packets and the packets of data where undetectable. Frequency 145.825 FM 30th December 2015.
From 11.59.30 some data detection in combined squelch noise and data content increasingly detected. The evidence of data content was to 12.03.45 but not as clear as earlier in the morning when transit was to the South of London.
Whilst evidence of data transmission received as squlech noise continued to 12.08 the periods became shorter.
Direct overpass of London was poorer data reception than pass to the South of London
From 11.58 am to 12.08 there was squelch generation with the packets and the packets of data where undetectable. Frequency 145.825 FM 30th December 2015.
From 11.59.30 some data detection in combined squelch noise and data content increasingly detected. The evidence of data content was to 12.03.45 but not as clear as earlier in the morning when transit was to the South of London.
Whilst evidence of data transmission received as squlech noise continued to 12.08 the periods became shorter.
The better data was towards 12.02 to 12.03. This is was on passing the radio antenna site.
Direct overpass of London was poorer data reception than pass to the South of London
From 11.58 am to 12.08 there was squelch generation with the packets and the packets of data where undetectable. Frequency 145.825 FM 30th December 2015.
From 11.59.30 some data detection in combined squelch noise and data content increasingly detected. The evidence of data content was to 12.03.45 but not as clear as earlier in the morning when transit was to the South of London.
Whilst evidence of data transmission received as squlech noise continued to 12.08 the periods became shorter.
The better data was towards 12.02 to 12.03. This is was on passing the radio antenna site.