GEE错误：Image.select: Band pattern ‘BQA‘ did not match any bands. Available bands:

var roi = /* color: #d63000 */ee.Geometry.Point([-121.9353461265564, 37.56180984982223]),
    l8toa = ee.ImageCollection("LANDSAT/LC08/C02/T1_TOA");
Map.centerObject(roi, 10);

// This field contains UNIX time in milliseconds.
var timeField = 'system:time_start';

// Use this function to mask clouds in Landsat 8 imagery.
var maskClouds = function(image) {
  var quality = image.select('BQA');
  var cloud01 = quality.eq(61440);
  var cloud02 = quality.eq(53248);
  var cloud03 = quality.eq(28672);
  var mask = cloud01.or(cloud02).or(cloud03).not();
  return image.updateMask(mask);
};

// Use this function to add variables for NDVI, time and a constant
// to Landsat 8 imagery.
var addVariables = function(image) {
  // Compute time in fractional years since the epoch.
  var date = ee.Date(image.get(timeField));
  var years = date.difference(ee.Date('1970-01-01'), 'year');
  // Return the image with the added bands.
  return image
    // Add an NDVI band.
    .addBands(image.normalizedDifference(['B5', 'B4']).rename('NDVI')).float()
    // Add a time band.
    .addBands(ee.Image(years).rename('t').float())
    // Add a constant band.
    .addBands(ee.Image.constant(1));
};

// Remove clouds, add variables and filter to the area of interest.
var filteredLandsat = l8toa
  .filterBounds(roi)
  .map(maskClouds)
  .map(addVariables);

// Plot a time series of NDVI at a single location.
var l8Chart = ui.Chart.image.series(filteredLandsat.select('NDVI'), roi)
    .setChartType('ScatterChart')
    .setOptions({
      title: 'Landsat 8 NDVI time series at ROI',
      trendlines: {0: {
        color: 'CC0000'
      }},
      lineWidth: 1,
      pointSize: 3,
    });
print(l8Chart);

var roi = /* color: #d63000 */ee.Geometry.Point([-121.9353461265564, 37.56180984982223]),
    l8toa = ee.ImageCollection("LANDSAT/LC08/C02/T1_TOA");
Map.centerObject(roi, 10);

// Use this function to mask clouds in Landsat 8 imagery.
var maskClouds = function(image) {
  var qa = image.select('QA_PIXEL');
  /// Check that the cloud bit is off.
  // See https://www.usgs.gov/media/files/landsat-8-9-olitirs-collection-2-level-1-data-format-control-book
  var mask = qa.bitwiseAnd(1 << 3).eq(0);
  return image.updateMask(mask);
};

// This field contains UNIX time in milliseconds.
var timeField = 'system:time_start';


// Use this function to add variables for NDVI, time and a constant
// to Landsat 8 imagery.
var addVariables = function(image) {
  // Compute time in fractional years since the epoch.
  var date = ee.Date(image.get(timeField));
  var years = date.difference(ee.Date('1970-01-01'), 'year');
  // Return the image with the added bands.
  return image
    // Add an NDVI band.
    .addBands(image.normalizedDifference(['B5', 'B4']).rename('NDVI')).float()
    // Add a time band.
    .addBands(ee.Image(years).rename('t').float())
    // Add a constant band.
    .addBands(ee.Image.constant(1));
};

// Remove clouds, add variables and filter to the area of interest.
var filteredLandsat = l8toa
  .filterBounds(roi)
  .map(maskClouds)
  .map(addVariables);

// Plot a time series of NDVI at a single location.
var l8Chart = ui.Chart.image.series(filteredLandsat.select('NDVI'), roi)
    .setChartType('ScatterChart')
    .setOptions({
      title: 'Landsat 8 NDVI time series at ROI',
      trendlines: {0: {
        color: 'CC0000'
      }},
      lineWidth: 1,
      pointSize: 3,
    });
print(l8Chart);