LolaS

now they offer comparative representation of in situ measured results with AQI, I dont see big difference as some users claims

10 hours ago, cmsally said:

There is only the link page for a site called Ubidots that seems to have nothing to do specifically with pollution measuring. Is there any cross reference to prove those measuring sites actually exist, and I still don't see any actual evidence to back up that they measure "close to the road".

 

but that is direct contact ( two links) to the creators of those sensors, you can contact and talk with them directly. That is why is called interent of things, I saw the same question asked there in the group, It was you?

you have all rights to ask these question, it is legitimate to know, but I provided both links. Am I wrong? if you cant see I can repost again

48 minutes ago, cmsally said:

have been looking for more info on measuring stations for CMU, Suan Dokh, Mae Hia and can find nothing. It says above that they monitor close to the road, this would suggest that there is info out there giving the specific location. Would someone be so kind as to point me to that info.

but I posted those links.

2 hours ago, TheScribe said:

LolaS wrote: "there are 3 sensors one in CMU, one in suandok, and second in maehia."

 

Well that is good.  I hope you can now set up a public website that gives us all the information that they are collecting.  I'm looking forward to seeing it!

but I posted

28 minutes ago, TheScribe said:

There's lots of info on the aqicn.org website about how they collect and present the data.  All air pollution data on particulates are measured in micro-grammes per cubic metre (equal to ppb or parts-per-billion).  

 

Quite why the Thai and Chinese websites show very different values for what seems to be the same monitoring stations is a mystery to me.  

 

On the aqmthai.com site, you need to click the "report" tab, choose "manual report", choose  35t or 36 t for either of the 2 monitoring stations supported, enter dates and report type, choose pm10 or pm2.5, choose dates, click button for table or graph. All damn fiddly but it can be done...

 

LolaS, sunny day or not tells us nothing about particulate air pollution.  Nothing at all.  aqicn website tells us how the data is collected and reported.  Look at http://aqicn.org/gaia/.   Satellite readings are never mentioned at all.  I think you're making the whole thing up.  But why?

aqicn state

The Gaia Ax series is a semi-professional Air Quality monitoring product

I trust science and professional measurement, I dont trust approximation,  there are 3 sensors one in CMU, one in suandok, and second in maehia.

also they measure close to road. AQICN is unrealiable, 

10 minutes ago, TheScribe said:

The ubidots figures are so wildly different from the other readings for northern Thailand that there must be something amiss. Anyone who's been out and about in Chiangmai city knows that the air in CMU, Mae Hia and  Suan Dok is really pretty dirty - just walk around for an hour and blow your nose into a clean handkerchief  to see the black filth all us city dwellers endure.   Get real!

ubidots reading are not different from the government one, because they are based on real measurements, use sensors and real-time.

Absolutelly, blatant lies, today is sunny days, no where dust or smoke in air.

he following analysis graphs are based on "day +1" forecast

Forecast, keyword not same as real time air analysis

satelite images cannot diferentiate between these 3 pollutions

EPA’s bands for Good, Moderate, etc are based on 24 hour numbers. If you are exposed to a 24hr average PM2.5 of 100, it is unhealthy. AQICN, however, uses the 1hr number. The health implications for exposure to a 1-hr average number has not been determined. This means that the risk is almost certainly overstated.

Saying that, this 1hr number is far more useful for making on the spot decisions about outdoor activities than the 3hr PSI which looks at longer trends. Yes, use AQICN, but do not expect the government to announce a state of emergency based on their numbers.

1 hour ago, cmsally said:

PM2.5 of around 30 for CM Uni! Seriously can't be right!

Even my basic "sinusometer" can tell it must be over 150 for PM2.5

 

The aqi site says 155 !!

AQI site is not the reliable or reputable source of information, their technology is not based on real-time in-situ measurement, they don't use sensors on the ground, they calculate from approximation from satellite images, These approximations cannot defer from water vapor and PM2.5 particles

not accurate for Chiang Mai

https://app.ubidots.com/ubi/public/getdashboard/page/gAfjzNIxwBZ0AsYwALovqce9KtA#/

this is a picture of lab members, Editor please remove if it is not allowed, but they post their pictures publically online,, I think it is ok. No?

this is a picture of sensor in Mae Hia

1 hour ago, Ruffian Dick said:

This just in: CM air pollution all due to incense smoke from Makha Bucha day. Makes sense don’t it.


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this low blow, very distasteful comment about Buddist culture. can we be on topic? this is important subject and people are using a lot of fear mongering. based on unreliable data.

14 minutes ago, simoh1490 said:

I think perhaps it has more to do with the location of the sensor, the readings indicate that it's almost a closed room environment because there's such little variance. Perhaps take a look at the PCD or AQI sites and pick a sensor series at random and look at the profile over a 24 hour period.

 

let me check the exact location, position of the sensor, I only know that they are in MeaHia, Suandok and CMU campus.

I only know it comes from IoT lab and what is make from.

31 minutes ago, simoh1490 said:

Sorry, also to add: you realise of course that your readings are totally at odds with what the PCD are reporting currently?

20 minutes ago, simoh1490 said:

Sorry, also to add: you realise of course that your readings are totally at odds with what the PCD are reporting currently?

let me find out about the specification of sensors use and apparatus for measurements.

I believe science and in situ measurement, I don't trust satellite approximation. Aqi website that people like to share here is not a credible source of information and is not based on concrete data.

I don't like your fear mongering if you think that Chiang Mai University is fake institution, I would like to see evidence for your false accusations. 

Quote

CMU Air Alert ดูข้อมูล real-time วันนี้ฝุ่นน้อยกว่าเมื่อวานครับ ดูข้อมูลปััจจุบันคลิก ... https://app.ubidots.com/…/…/page/gAfjzNIxwBZ0AsYwALovqce9KtA 
หมายเหตุ: เนื่องจากมีมติสภา มช. เมื่อสัปดาห์ที่แล้ว ให้ทำแอป CMU Air Alert ซึ่งผมได้รับข่าวแจ้งจากหัวหน้าศูนย์วิจัยวัสดุฯและหัวหน้าภาควิชาฟิสิกส์ฯ ผ่านลงมา ผมเลยอาสาทำให้ฟรีเป็นเวอร์ชันแบบแจ้งเตือนกลุ่มไลน์ พร้อมกับแสดงกราฟและตัวเลขในเว็บแบบ real-time ครับ http://line.me/R/ti/g/xXN9f4LVdi (เข้าร่วมกลุ่มไลน์ CMU Air Alert ให้ copy ลิงค์นี้ส่งให้เพื่อนในไลน์ก่อน แล้วคลิกลิ้งค์นี้ในไลน์ บนหน้าจอโทรศัพท์มือถือ)

 

They update for all 3 campuses of CMU, meahia, suandok and main campus

the link to line groups is inside

On 2/27/2018 at 2:14 PM, CheGuava said:

 

 

Values look really low, I think something is off with that one.  The average for the day shows around 25 ug/m3, that's mid-yellow on the US EPA AQI scale, around 80 US AQI.   All other stations today show about 108-147 US AQI. 

Yes, that is CMU, it is abbreviation for Chiang Mai University, location near Angew lake, or wat umo

On 2/27/2018 at 2:14 PM, CheGuava said:

 

 

Values look really low, I think something is off with that one.  The average for the day shows around 25 ug/m3, that's mid-yellow on the US EPA AQI scale, around 80 US AQI.   All other stations today show about 108-147 US AQI. 

Yes, that is CMU, it is abbreviation for Chiang Mai University, location near Angew lake, or wat umong

21 hours ago, scotbeve said:

Looks far too low compared with others.

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there are no others station in CMU