A BE35 pilot is concerned that the tvl ASOS does not disseminate pressure altitude information.

Attributes
ACN	588158
Time
Date	200307
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : tvl.airport
State Reference	GA
Altitude	msl single value : 7500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : tvl.tower
Operator	general aviation : personal
Make Model Name	Bonanza 35
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 15 flight time total : 1200 flight time type : 100
ASRS Report	588158
Person 2
Affiliation	other
Function	controller : local
Events
Anomaly	non adherence : published procedure other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Supplementary
Problem Areas	Airport Flight Crew Human Performance
Primary Problem	Ambiguous

Narrative:

The south lake tahoe ASOS broadcasts the standard data plus density altitude. The poh performance charts use pressure altitude and temperature. It is not possible to read the performance charts, given the ASOS data. Problem was solved by finding pressure altitude from the poh density altitude chart. Request: ASOS should broadcast pressure altitude, temperature and density altitude, or, change all poh to use density altitude!

Original NASA ASRS Text

Title: A BE35 PLT IS CONCERNED THAT THE TVL ASOS DOES NOT DISSEMINATE PRESSURE ALT INFO.

Narrative: THE S LAKE TAHOE ASOS BROADCASTS THE STANDARD DATA PLUS DENSITY ALT. THE POH PERFORMANCE CHARTS USE PRESSURE ALT AND TEMP. IT IS NOT POSSIBLE TO READ THE PERFORMANCE CHARTS, GIVEN THE ASOS DATA. PROB WAS SOLVED BY FINDING PRESSURE ALT FROM THE POH DENSITY ALT CHART. REQUEST: ASOS SHOULD BROADCAST PRESSURE ALT, TEMP AND DENSITY ALT, OR, CHANGE ALL POH TO USE DENSITY ALT!

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.