Earth engine : Land Surface Temperature

var dataset = ee.FeatureCollection('USDOS/LSIB_SIMPLE/2017');

var thailandBorder = dataset.filter(ee.Filter.eq('country_na', 'Thailand'));

.

print(thailandBorder);

Map.centerObject(thailandBorder, 6);

Map.addLayer(thailandBorder);

var modis = ee.ImageCollection("MODIS/006/MOD11A2");

var start = ee.Date('2020-01-01');

var dateRange = ee.DateRange(start, start.advance(1, 'month'));

var mod11a2 = modis.filterDate(dateRange);

var modLSTday = mod11a2.select('LST_Day_1km');

var modLSTc = modLSTday.map(function(img) {

return img

.multiply(0.02)

.subtract(273.15)

.copyProperties(img, ['system:time_start']);

});

var ts1 = ui.Chart.image.series({

imageCollection: modLSTc,

region: thailandBorder,

reducer: ee.Reducer.mean(),

scale: 1000,

xProperty: 'system:time_start'})

.setOptions({

title: 'LST 2020 Time Series',

vAxis: {title: 'LST Celsius'}});

print(ts1);

var clippedLSTc = modLSTc.mean().clip(thailandBorder);

Map.addLayer(clippedLSTc, {

min: 20, max: 40,

palette: ['blue', 'limegreen', 'yellow', 'darkorange', 'red']},

'Mean temperature Thailand, 2020');