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Topic Options
#386776 - 07/21/18 11:05 PM Stratus 2 and ADS/B-In pirep
Curious1 Offline
Gold Pilot

Registered: 03/12/13
Posts: 1409
Loc: Pacific NW, USA
I recently flew from Spokane, WA (KSFF) to Baker City, OR. Most of the flight was at 7,500 to 8,500 feet MSL. From KSFF to Lewiston, ID (KLWS) I climbed and then cruised at 7,500 and had 'excellent' signal reported by on my Stratus 2. At Rogersburg, WA (D69) I began seeing 'marginal' reception reported. I climbed to 8,500’ and continued to see ‘Marginal’ reception. About 15 miles N of La Grande, OR (KLGD) reception improved to ‘excellent'. This continued as I flew over KLGD and descended to and through 7,500 on the last leg to KBKE. Soon after passing through 7,500 it degraded to 'marginal'. About 6,500' the signal became unavalable. This continued through the remainder of the descent and landing at KBKE.

I hadn't really thought MUCH about the big gaps in ADS/D coverage in the mountainous west. They're real.
_________________________
"Safety" simply means "the risk is acceptable" - no more, no less.

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#386777 - 07/22/18 03:13 AM Re: Stratus 2 and ADS/B-In pirep [Re: Curious1]
Kentucky Captain Online   content
Gold Pilot

Registered: 06/13/14
Posts: 1296
Loc: Mount Washington, KY
Originally Posted By: Curious1
I recently flew from Spokane, WA (KSFF) to Baker City, OR. Most of the flight was at 7,500 to 8,500 feet MSL. From KSFF to Lewiston, ID (KLWS) I climbed and then cruised at 7,500 and had 'excellent' signal reported by on my Stratus 2. At Rogersburg, WA (D69) I began seeing 'marginal' reception reported. I climbed to 8,500’ and continued to see ‘Marginal’ reception. About 15 miles N of La Grande, OR (KLGD) reception improved to ‘excellent'. This continued as I flew over KLGD and descended to and through 7,500 on the last leg to KBKE. Soon after passing through 7,500 it degraded to 'marginal'. About 6,500' the signal became unavalable. This continued through the remainder of the descent and landing at KBKE.

I hadn't really thought MUCH about the big gaps in ADS/D coverage in the mountainous west. They're real.


I never really thought about the location of antennas around here since you can't swing a dead cat without hitting one. On a trip we took a few weeks ago we were at 8000' and were watching weather close to our route about 100 miles ahead of us. I noticed that the update on the weather was happening at 4 minutes interval.

Hopefully, in the near future, the FAA will be planting more sites in your area. I think ADS-B is a great thing and has been of great benefit to me in traffic and weather.
_________________________

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#386810 - 07/23/18 10:04 AM Re: Stratus 2 and ADS/B-In pirep [Re: Kentucky Captain]
Curious1 Offline
Gold Pilot

Registered: 03/12/13
Posts: 1409
Loc: Pacific NW, USA
On the return flight from KBKE to KSFF I climbed to 8,500' as I flew due east toward Halfway (a small town just west of the Oregon/Idaho border) to the Snake River gorge. I then flew north over the Snake River and the Hells Canyon toward Lewistin, ID and Spokane. At no time from takeoff to just 50 miles or so south of KLWS did I have any ADS/B reception. Zip! About the Snake's confluence with the Imnaha River I climbed to 9,000 or so... still no reception. It wasn't 'til Rogersburg at the Washington border that the Stratus reported 'marginal' signal. I didn't see a strong signal until within just a few miles south of Lewiston while cruising at 8,500'. About Oaksdale at 8,500' the signal again degraded to 'marginal' for a few miles. FWIW, my Stratus 2 receiver was about 1" above the top of the left side interior and midway between the forward door post and the left side of my panel. I think signal strength is strongly affected by where the Stratus is located. I was surprised to see the strong signal degrade between KLWS and KSFF Sunday on the return flight (it was consistently strong over Oaksdale on the flight south on Saturday).
_________________________
"Safety" simply means "the risk is acceptable" - no more, no less.

Top
#386811 - 07/23/18 10:17 AM Re: Stratus 2 and ADS/B-In pirep [Re: Curious1]
Henry M. Offline
Gold Pilot

Registered: 08/23/11
Posts: 1985
Loc: Leander, TX
My understanding is that the signal strength reported by ForeFlight is related to the number of towers received. Marginal means only one tower is in sight. I don't think it relates to the actual strength of the RF signal.
_________________________
Henry
1965 C182H

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#386827 - 07/23/18 11:30 PM Re: Stratus 2 and ADS/B-In pirep [Re: Henry M.]
Flyboy712 Offline
Bronze Pilot

Registered: 08/27/14
Posts: 623
Loc: Washington
I was based out of baker city for a while. There is no ADS-B coverage in that area if you're lower than 7500. You'll start picking up signal above that. It's a dead spot masked by the mountains. If you go to the FAA ADS-B website it'll show you coverage based on altitude and the last time I checked the website confirmed this. I was worried my ADS-B quit working when I moved there. Radar coverage is spotty below 7500 also. You can get good coms with salt lake center as they have several repeater towers throughout that area but radar and ADS-B is spotty.

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#386837 - 07/24/18 06:05 PM Re: Stratus 2 and ADS/B-In pirep [Re: Flyboy712]
Curious1 Offline
Gold Pilot

Registered: 03/12/13
Posts: 1409
Loc: Pacific NW, USA
Originally Posted By: Flyboy712
I was based out of baker city for a while. There is no ADS-B coverage in that area if you're lower than 7500. You'll start picking up signal above that. It's a dead spot masked by the mountains. If you go to the FAA ADS-B website it'll show you coverage based on altitude and the last time I checked the website confirmed this. I was worried my ADS-B quit working when I moved there. Radar coverage is spotty below 7500 also. You can get good coms with salt lake center as they have several repeater towers throughout that area but radar and ADS-B is spotty.


FWIW, I was dropped by Center inbound to KBKE over KLGD at 7800, nor did I connect with FSS on 122.4 at KBKE on the ground after landing. No big deal since cell coverage was 3 bars. I did reach Mcminnville Radio climbing out to to the east on the way home. I hit Boise Radio over Halfway at 7,500 and lost 'em as I turned North over the Snake.
_________________________
"Safety" simply means "the risk is acceptable" - no more, no less.

Top
#386863 - 07/27/18 12:09 AM Re: Stratus 2 and ADS/B-In pirep [Re: Curious1]
Kentucky Captain Online   content
Gold Pilot

Registered: 06/13/14
Posts: 1296
Loc: Mount Washington, KY
Originally Posted By: Curious1
On the return flight from KBKE to KSFF I climbed to 8,500' as I flew due east toward Halfway (a small town just west of the Oregon/Idaho border) to the Snake River gorge. I then flew north over the Snake River and the Hells Canyon toward Lewistin, ID and Spokane. At no time from takeoff to just 50 miles or so south of KLWS did I have any ADS/B reception. Zip! About the Snake's confluence with the Imnaha River I climbed to 9,000 or so... still no reception. It wasn't 'til Rogersburg at the Washington border that the Stratus reported 'marginal' signal. I didn't see a strong signal until within just a few miles south of Lewiston while cruising at 8,500'. About Oaksdale at 8,500' the signal again degraded to 'marginal' for a few miles. FWIW, my Stratus 2 receiver was about 1" above the top of the left side interior and midway between the forward door post and the left side of my panel. I think signal strength is strongly affected by where the Stratus is located. I was surprised to see the strong signal degrade between KLWS and KSFF Sunday on the return flight (it was consistently strong over Oaksdale on the flight south on Saturday).


We're building a new house now and have one for sale. Comes with fabulous ADS-B coverage. Maybe I should use that in the property description.
_________________________

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#386873 - 07/27/18 09:57 AM Re: Stratus 2 and ADS/B-In pirep [Re: Kentucky Captain]
Curious1 Offline
Gold Pilot

Registered: 03/12/13
Posts: 1409
Loc: Pacific NW, USA
Originally Posted By: Kentucky Captain


We're building a new house now and have one for sale. Comes with fabulous ADS-B coverage. Maybe I should use that in the property description.


I've never met or even heard of any C172 owner before (now) who owns a house even more ostentatious, huge, and useful as a landmark at 8,500' than Al Gore's tiny cottage! smile Here Al Gore's modest cottage is compared to another (less infamous) dwelling.
_________________________
"Safety" simply means "the risk is acceptable" - no more, no less.

Top
#386914 - 07/29/18 02:00 AM Re: Stratus 2 and ADS/B-In pirep [Re: Curious1]
Kentucky Captain Online   content
Gold Pilot

Registered: 06/13/14
Posts: 1296
Loc: Mount Washington, KY
Originally Posted By: Curious1
Originally Posted By: Kentucky Captain


We're building a new house now and have one for sale. Comes with fabulous ADS-B coverage. Maybe I should use that in the property description.


I've never met or even heard of any C172 owner before (now) who owns a house even more ostentatious, huge, and useful as a landmark at 8,500' than Al Gore's tiny cottage! smile Here Al Gore's modest cottage is compared to another (less infamous) dwelling.


Well, we are downsizing after all.
_________________________

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