1. Ali Evaluation matters and Other Candidate Sites in Ali area?
T. SASAKI (佐々木敏由紀)
with supports by H.S.Wang (王紅師) and Y. Yao（姚永強)

2. Ali Evaluation matters
EACOA Medium-size Telescope Science Workshop, Kunming, China, June 21-25, 2013
T. Sasaki: “Ali Evaluation matters and Other Candidate Sites in Ali area?”
Ali Evaluation matters
Crucial evaluation is inevitable in summer season
- Oma site: bad clear sky ration < 50%
Cloud Monitor and Weather Station
on 10m Tower at Gar summit

3. Ali Evaluation matters
EACOA Medium-size Telescope Science Workshop, Kunming, China, June 21-25, 2013
T. Sasaki: “Ali Evaluation matters and Other Candidate Sites in Ali area?”
Ali Evaluation matters
(2) Strongly Windy condition in winter season,
- detected in Nov-Jan, 2012 and Dec-Jan, 2013

4. Ali Evaluation matters
EACOA Medium-size Telescope Science Workshop, Kunming, China, June 21-25, 2013
T. Sasaki: “Ali Evaluation matters and Other Candidate Sites in Ali area?”
Ali Evaluation matters
(2) Strongly Windy condition in winter season,
- detected in Nov-Jan, 2012 and Dec-Jan, 2013

5. Ali Evaluation matters
EACOA Medium-size Telescope Science Workshop, Kunming, China, June 21-25, 2013
T. Sasaki: “Ali Evaluation matters and Other Candidate Sites in Ali area?”
Ali Evaluation matters
(2) Strongly Windy condition in winter season,
- detected in Nov-Jan, 2012 and Dec-Jan, 2013

6. Ali Evaluation matters
EACOA Medium-size Telescope Science Workshop, Kunming, China, June 21-25, 2013
T. Sasaki: “Ali Evaluation matters and Other Candidate Sites in Ali area?”
Ali Evaluation matters
(2) Strongly Windy condition in winter season,
- calm wind during late Jan to May, 2013
In case of Dome/Telescope wind-resistant stability up to 20m/sec
Wind-resistant stability up to 20m/sec is necessary
to design the dome/telescope at Ali.

7. Other Candidate Sites in Ali area?
EACOA Medium-size Telescope Science Workshop, Kunming, China, June 21-25, 2013
T. Sasaki: “Ali Evaluation matters and Other Candidate Sites in Ali area?”
Other Candidate Sites in Ali area?
・Search for during flight between Lhasa and Ali
Two candidate Peaks after fly by Mt. Kailash
Peak#1
Lat :48:07.96
Long 81:17:59.91
Alt m
Peak#2
Lat :20:27.27
Long 80:53:16.27
Alt m

8. Other Candidate Sites in Ali area?
EACOA Medium-size Telescope Science Workshop, Kunming, China, June 21-25, 2013
T. Sasaki: “Ali Evaluation matters and Other Candidate Sites in Ali area?”
Other Candidate Sites in Ali area?

9. Other Candidate Sites in Ali area?
EACOA Medium-size Telescope Science Workshop, Kunming, China, June 21-25, 2013
T. Sasaki: “Ali Evaluation matters and Other Candidate Sites in Ali area?”
Other Candidate Sites in Ali area?
- Visited the sites on June 3, 2013 from Shiquanhe 獅泉河 by vehicle
But peak#2 was under cloudy sky !

10. Other Candidate Sites in Ali area?
EACOA Medium-size Telescope Science Workshop, Kunming, China, June 21-25, 2013
T. Sasaki: “Ali Evaluation matters and Other Candidate Sites in Ali area?”
Other Candidate Sites in Ali area?
Weather Research and Forecasting (WRF) Model
NCAR(National Center for Atmosphere Research) and NCEP(National Centers for Environmental Prediction ).
Hongshuai Wang (王紅師) san and Yao san has simulated weather conditions
for 72 days over 2010 around Ali area(200km×200km) with 1km horizontal resolution
and vertical resolution is 65 levels from ground to 30km(1000Pa).
- Cloud Cover at Ali area
- Wind Speed and Direction
- PWV at Ali area
- Seeing distribution over Ali area

11. Other Candidate Sites in Ali area?
EACOA Medium-size Telescope Science Workshop, Kunming, China, June 21-25, 2013
T. Sasaki: “Ali Evaluation matters and Other Candidate Sites in Ali area?”
Other Candidate Sites in Ali area?
Weather Research and Forecasting (WRF) Model
Two Peaks covered
w/ much cloud !

12. Other Candidate Sites in Ali area?
EACOA Medium-size Telescope Science Workshop, Kunming, China, June 21-25, 2013
T. Sasaki: “Ali Evaluation matters and Other Candidate Sites in Ali area?”
Other Candidate Sites in Ali area?
Weather Research and Forecasting (WRF) Model

13. Other Candidate Sites in Ali area?
EACOA Medium-size Telescope Science Workshop, Kunming, China, June 21-25, 2013
T. Sasaki: “Ali Evaluation matters and Other Candidate Sites in Ali area?”
Other Candidate Sites in Ali area?
Weather Research and Forecasting (WRF) Model

14. Other Candidate Sites in Ali area?
EACOA Medium-size Telescope Science Workshop, Kunming, China, June 21-25, 2013
T. Sasaki: “Ali Evaluation matters and Other Candidate Sites in Ali area?”
Other Candidate Sites in Ali area?
Weather Research and Forecasting (WRF) Model

15. Other Candidate Sites in Ali area?
EACOA Medium-size Telescope Science Workshop, Kunming, China, June 21-25, 2013
T. Sasaki: “Ali Evaluation matters and Other Candidate Sites in Ali area?”
Other Candidate Sites in Ali area?
Weather Research and Forecasting (WRF) Model
Could you find
a new site ?
difficulat to find new nice sites around Ali
w/ excellent observational conditions

16. Ali Evaluation matters and Other Candidate Sites in Ali area?
EACOA Medium-size Telescope Science Workshop, Kunming, China, June 21-25, 2013
T. Sasaki: “Ali Evaluation matters and Other Candidate Sites in Ali area?”
Kailash
Ali Evaluation matters and
Other Candidate Sites in Ali area?
I have tried to find more excellent site around Ali, but I failed.
So should continue
to evaluate Astronomical observation conditions at Gar site
for at least one more year.