import numpy as np
import matplotlib.pyplot as plt

# source: modtran
# Mid-latitude summer, water column 3635.9atm-cm, ozone column 0.33176atm-cm
# CO2 420ppmv, CO 0.15ppmv, CH4 1.8ppmv, ground temperature 294.2K,
# visibility rural 23.0km, sensor altitude 99km, sensor zenith 180deg
lambda_transmission = [
[1450.0, 0.019], [1450.2, 0.002], [1450.9, 0.009], [1451.2, 0.072],
[1451.5, 0.130], [1451.8, 0.071], [1452.0, 0.044], [1452.3, 0.142],
[1452.6, 0.163], [1452.9, 0.092], [1453.2, 0.165], [1453.4, 0.306],
[1453.7, 0.396], [1454.0, 0.302], [1454.3, 0.234], [1454.6, 0.255],
[1454.8, 0.133], [1455.1, 0.032], [1455.4, 0.066], [1455.7, 0.158],
[1456.0, 0.192], [1456.3, 0.261], [1456.6, 0.294], [1456.9, 0.214],
[1457.1, 0.220], [1457.4, 0.173], [1457.7, 0.214], [1458.0, 0.393],
[1458.3, 0.395], [1458.6, 0.359], [1458.8, 0.353], [1459.1, 0.374],
[1459.4, 0.394], [1459.7, 0.238], [1460.0, 0.105], [1460.2, 0.057],
[1460.5, 0.158], [1460.8, 0.211], [1461.1, 0.115], [1461.4, 0.083],
[1461.6, 0.174], [1461.9, 0.310], [1462.2, 0.366], [1462.5, 0.240],
[1462.8, 0.102], [1463.0, 0.028], [1463.3, 0.116], [1463.6, 0.263],
[1463.9, 0.366], [1464.2, 0.513], [1464.4, 0.517], [1464.7, 0.316],
[1465.0, 0.088], [1465.3, 0.110], [1465.6, 0.203], [1465.8, 0.126],
[1466.1, 0.050], [1466.4, 0.028], [1466.7, 0.031], [1467.0, 0.059],
[1467.2, 0.107], [1467.5, 0.095], [1467.8, 0.146], [1468.1, 0.231],
[1468.4, 0.239], [1468.6, 0.293], [1468.9, 0.180], [1469.2, 0.047],
[1469.5, 0.027], [1469.8, 0.091], [1470.0, 0.136], [1470.3, 0.053],
[1470.6, 0.002], [1470.9, 0.006], [1471.2, 0.057], [1471.4, 0.107],
[1471.7, 0.107], [1472.0, 0.075], [1472.3, 0.022], [1472.6, 0.098],
[1472.8, 0.170], [1473.1, 0.142], [1473.4, 0.110], [1473.7, 0.082],
[1474.0, 0.261], [1474.2, 0.464], [1474.5, 0.464], [1474.8, 0.525],
[1475.1, 0.485], [1475.4, 0.241], [1475.6, 0.061], [1475.9, 0.107],
[1476.2, 0.243], [1476.5, 0.183], [1476.8, 0.058], [1477.0, 0.117],
[1477.3, 0.188], [1477.6, 0.096], [1477.9, 0.049], [1478.2, 0.235],
[1478.4, 0.430], [1478.7, 0.331], [1479.0, 0.211], [1479.3, 0.116],
[1479.6, 0.163], [1479.8, 0.175], [1480.1, 0.051], [1480.4, 0.035],
[1480.7, 0.198], [1481.0, 0.409], [1481.2, 0.350], [1481.5, 0.136],
[1481.8, 0.070], [1482.1, 0.175], [1482.4, 0.357], [1482.6, 0.451],
[1482.9, 0.362], [1483.2, 0.333], [1483.5, 0.440], [1483.8, 0.421],
[1484.0, 0.222], [1484.3, 0.090], [1484.6, 0.236], [1484.9, 0.388],
[1485.2, 0.271], [1485.4, 0.269], [1485.7, 0.331], [1486.0, 0.253],
[1486.3, 0.163], [1486.6, 0.097], [1486.8, 0.117], [1487.1, 0.148],
[1487.4, 0.262], [1487.7, 0.250], [1488.0, 0.177], [1488.2, 0.322],
[1488.5, 0.479], [1488.8, 0.443], [1489.1, 0.452], [1489.4, 0.304],
[1489.6, 0.238], [1489.9, 0.498], [1490.2, 0.692], [1490.5, 0.695],
[1490.8, 0.647], [1491.0, 0.500], [1491.3, 0.285], [1491.6, 0.318],
[1491.9, 0.332], [1492.2, 0.417], [1492.4, 0.427], [1492.7, 0.369],
[1493.0, 0.463], [1493.3, 0.621], [1493.6, 0.662], [1493.8, 0.452],
[1494.1, 0.460], [1494.4, 0.594], [1494.7, 0.502], [1495.0, 0.368],
[1495.2, 0.438], [1495.5, 0.443], [1495.8, 0.507], [1496.1, 0.539],
[1496.4, 0.397], [1496.6, 0.579], [1496.9, 0.782], [1497.2, 0.742],
[1497.5, 0.609], [1497.8, 0.471], [1498.0, 0.467], [1498.3, 0.632],
[1498.6, 0.674], [1498.9, 0.595], [1499.2, 0.563], [1499.4, 0.576],
[1499.7, 0.612], [1499.9, 0.815], [1500.2, 0.848], [1500.5, 0.710],
[1500.8, 0.695], [1501.0, 0.744], [1501.3, 0.737], [1501.6, 0.634],
[1501.9, 0.663], [1502.1, 0.793], [1502.4, 0.676], [1502.7, 0.573],
[1503.0, 0.583], [1503.2, 0.525], [1503.5, 0.412], [1503.8, 0.340],
[1504.1, 0.450], [1504.4, 0.464], [1504.6, 0.420], [1504.9, 0.569],
[1505.2, 0.710], [1505.5, 0.740], [1505.7, 0.725], [1506.0, 0.820],
[1506.3, 0.867], [1506.6, 0.884], [1506.8, 0.828], [1507.1, 0.710],
[1507.4, 0.747], [1507.7, 0.827], [1507.9, 0.744], [1508.2, 0.542],
[1508.5, 0.387], [1508.8, 0.394], [1509.1, 0.596], [1509.3, 0.806],
[1509.6, 0.888], [1509.9, 0.828], [1510.2, 0.743], [1510.4, 0.788],
[1510.7, 0.778], [1511.0, 0.722], [1511.3, 0.775], [1511.5, 0.827],
[1511.8, 0.879], [1512.1, 0.814], [1512.4, 0.726], [1512.6, 0.728],
[1512.9, 0.702], [1513.2, 0.734], [1513.5, 0.688], [1513.7, 0.612],
[1514.0, 0.624], [1514.3, 0.757], [1514.6, 0.794], [1514.9, 0.789],
[1515.1, 0.869], [1515.4, 0.865], [1515.7, 0.876], [1516.0, 0.808],
[1516.2, 0.704], [1516.5, 0.721], [1516.8, 0.711], [1517.1, 0.756],
[1517.3, 0.707], [1517.6, 0.710], [1517.9, 0.834], [1518.2, 0.802],
[1518.4, 0.765], [1518.7, 0.715], [1519.0, 0.641], [1519.3, 0.697],
[1519.5, 0.788], [1519.8, 0.833], [1520.1, 0.804], [1520.4, 0.779],
[1520.7, 0.867], [1520.9, 0.916], [1521.3, 0.898], [1521.5, 0.823],
[1521.8, 0.778], [1522.1, 0.865], [1522.5, 0.911], [1523.1, 0.880],
[1523.4, 0.839], [1523.7, 0.887], [1524.0, 0.906], [1524.2, 0.831],
[1524.5, 0.780], [1524.8, 0.817], [1525.1, 0.840], [1525.4, 0.828],
[1525.7, 0.803], [1526.0, 0.829], [1526.2, 0.841], [1526.5, 0.795],
[1526.8, 0.812], [1527.1, 0.836], [1527.3, 0.803], [1527.6, 0.869],
[1528.0, 0.892], [1528.2, 0.901], [1528.5, 0.859], [1528.8, 0.832],
[1529.1, 0.886], [1529.4, 0.874], [1529.6, 0.839], [1529.9, 0.858],
[1530.1, 0.845], [1530.5, 0.851], [1530.7, 0.889], [1531.0, 0.844],
[1531.3, 0.785], [1531.6, 0.851], [1531.8, 0.901], [1532.1, 0.911],
[1532.4, 0.909], [1532.9, 0.905], [1533.4, 0.910], [1533.7, 0.892],
[1534.0, 0.877], [1534.3, 0.899], [1534.7, 0.893], [1534.9, 0.850],
[1535.2, 0.849], [1535.5, 0.889], [1535.7, 0.887], [1536.0, 0.886],
[1536.3, 0.896], [1536.7, 0.895], [1536.9, 0.875], [1537.2, 0.864],
[1537.5, 0.888], [1537.8, 0.909], [1538.1, 0.920], [1538.4, 0.913],
[1538.8, 0.901], [1539.1, 0.876], [1539.4, 0.873], [1539.6, 0.901],
[1540.0, 0.914], [1540.4, 0.911], [1540.8, 0.905], [1541.2, 0.904],
[1541.6, 0.895], [1541.9, 0.884], [1542.1, 0.870], [1542.4, 0.894],
[1542.7, 0.903], [1543.1, 0.902], [1543.4, 0.916], [1543.7, 0.919],
[1544.0, 0.892], [1544.3, 0.854], [1544.5, 0.879], [1544.8, 0.918],
[1545.2, 0.925], [1545.5, 0.916], [1545.7, 0.908], [1546.1, 0.903],
[1546.4, 0.906], [1546.7, 0.914], [1547.0, 0.918], [1547.2, 0.917],
[1547.5, 0.914], [1548.0, 0.918], [1548.3, 0.923], [1548.6, 0.925],
[1548.9, 0.923], [1549.2, 0.924], [1549.6, 0.916], [1550.1, 0.924],
[1550.4, 0.921], [1550.7, 0.914], [1550.9, 0.912], [1551.2, 0.916],
[1551.5, 0.914], [1551.8, 0.897], [1552.0, 0.893], [1552.3, 0.915],
[1552.7, 0.924], [1552.9, 0.925], [1553.3, 0.928], [1553.7, 0.924],
[1554.0, 0.914], [1554.2, 0.910], [1554.5, 0.919], [1554.8, 0.923],
[1555.0, 0.927], [1555.2, 0.929], [1556.1, 0.927], [1556.3, 0.927],
[1556.6, 0.928], [1557.2, 0.926], [1557.4, 0.929], [1557.7, 0.929],
[1558.0, 0.925], [1558.3, 0.926], [1558.5, 0.924], [1558.8, 0.923],
[1559.2, 0.926], [1559.6, 0.925], [1560.0, 0.925], [1560.4, 0.927],
[1560.6, 0.923], [1560.9, 0.922], [1561.2, 0.927], [1561.4, 0.930],
[1561.8, 0.926], [1562.0, 0.910], [1562.3, 0.904], [1562.6, 0.916],
[1562.8, 0.915], [1563.1, 0.923], [1563.4, 0.928], [1563.6, 0.923],
[1563.9, 0.917], [1564.2, 0.911], [1564.5, 0.919], [1564.7, 0.928],
[1565.0, 0.928], [1565.4, 0.926], [1565.7, 0.918], [1565.9, 0.916],
[1566.2, 0.923], [1566.5, 0.927], [1566.7, 0.921], [1567.0, 0.918],
[1567.3, 0.919], [1567.5, 0.914], [1567.8, 0.911], [1568.0, 0.914],
[1568.3, 0.913], [1568.6, 0.908], [1568.9, 0.897], [1569.2, 0.888],
[1569.4, 0.883], [1569.7, 0.879], [1570.0, 0.872], [1570.2, 0.863],
[1570.5, 0.854], [1570.8, 0.848], [1571.0, 0.841], [1571.3, 0.834],
[1571.6, 0.833], [1571.9, 0.835], [1572.1, 0.832], [1572.4, 0.834],
[1572.9, 0.840], [1573.2, 0.845], [1573.5, 0.849], [1573.7, 0.856],
[1574.0, 0.867], [1574.3, 0.878], [1574.5, 0.888], [1574.8, 0.901],
[1575.1, 0.909], [1575.3, 0.910], [1575.6, 0.900], [1575.9, 0.890],
[1576.1, 0.881], [1576.4, 0.873], [1576.7, 0.872], [1576.9, 0.867],
[1577.2, 0.859], [1577.5, 0.861], [1577.8, 0.860], [1578.1, 0.856],
[1578.4, 0.855], [1578.6, 0.850], [1578.9, 0.862], [1579.2, 0.870],
[1579.4, 0.866], [1579.7, 0.872], [1580.0, 0.872], [1580.2, 0.881],
[1580.5, 0.882], [1580.8, 0.887], [1581.0, 0.892], [1581.3, 0.888],
[1581.6, 0.896], [1581.9, 0.900], [1582.1, 0.906], [1582.4, 0.903],
[1582.7, 0.905], [1582.9, 0.895], [1583.2, 0.902], [1583.5, 0.913],
[1583.7, 0.918], [1584.0, 0.916], [1584.3, 0.922], [1584.5, 0.921],
[1584.8, 0.920], [1585.1, 0.923], [1585.3, 0.928], [1585.6, 0.928],
[1585.9, 0.923], [1586.1, 0.912], [1586.4, 0.919], [1586.7, 0.924],
[1587.0, 0.913], [1587.2, 0.913], [1587.5, 0.927], [1587.7, 0.931],
[1588.1, 0.930], [1588.5, 0.930], [1588.9, 0.933], [1589.3, 0.932],
[1589.5, 0.931], [1589.9, 0.924], [1590.2, 0.918], [1590.5, 0.928],
[1590.8, 0.931], [1591.1, 0.931], [1591.4, 0.925], [1591.7, 0.919],
[1591.9, 0.926], [1592.2, 0.920], [1592.5, 0.919], [1592.7, 0.929],
[1593.0, 0.933], [1593.4, 0.932], [1593.8, 0.929], [1594.1, 0.916],
[1594.4, 0.911], [1594.6, 0.922], [1594.9, 0.928], [1595.2, 0.932],
[1595.7, 0.932], [1596.0, 0.923], [1596.2, 0.917], [1596.5, 0.921],
[1596.8, 0.921], [1597.0, 0.910], [1597.3, 0.911], [1597.6, 0.921],
[1597.8, 0.924], [1598.1, 0.921], [1598.4, 0.914], [1598.7, 0.909],
[1599.0, 0.908], [1599.3, 0.903], [1599.5, 0.896], [1599.8, 0.888],
[1600.1, 0.882], [1600.3, 0.875], [1600.7, 0.868], [1600.9, 0.859],
[1601.2, 0.847], [1601.5, 0.844], [1601.8, 0.841], [1602.1, 0.829],
[1602.4, 0.834], [1602.6, 0.841], [1603.0, 0.842], [1603.3, 0.846],
[1603.6, 0.852], [1603.8, 0.857], [1604.1, 0.864], [1604.4, 0.872],
[1604.7, 0.884], [1605.0, 0.898], [1605.3, 0.912], [1605.5, 0.923],
[1605.8, 0.922], [1606.1, 0.911], [1606.4, 0.900], [1606.7, 0.889],
[1607.0, 0.882], [1607.3, 0.874], [1607.6, 0.869], [1607.9, 0.865],
[1608.2, 0.858], [1608.4, 0.855], [1608.7, 0.862], [1609.0, 0.867],
[1609.3, 0.867], [1609.6, 0.867], [1609.9, 0.871], [1610.1, 0.868],
[1610.4, 0.868], [1610.7, 0.873], [1611.0, 0.881], [1611.3, 0.887],
[1611.5, 0.886], [1611.8, 0.893], [1612.1, 0.896], [1612.4, 0.901],
[1612.7, 0.903], [1613.0, 0.904], [1613.2, 0.899], [1613.5, 0.902],
[1613.8, 0.915], [1614.1, 0.917], [1614.4, 0.920], [1614.7, 0.919],
[1614.9, 0.921], [1615.3, 0.923], [1615.6, 0.925], [1615.9, 0.924],
[1616.1, 0.923], [1616.4, 0.915], [1616.7, 0.912], [1617.0, 0.921],
[1617.2, 0.928], [1617.5, 0.929], [1618.3, 0.928], [1618.5, 0.920],
[1618.8, 0.915], [1619.1, 0.925], [1619.4, 0.932], [1619.6, 0.933],
[1620.0, 0.933], [1621.0, 0.933], [1621.7, 0.933], [1622.0, 0.934],
[1622.5, 0.934], [1622.8, 0.934], [1623.7, 0.933], [1624.2, 0.934],
[1624.4, 0.931], [1624.7, 0.930], [1625.2, 0.931], [1625.8, 0.932],
[1626.1, 0.933], [1626.4, 0.935], [1626.7, 0.935], [1627.0, 0.934],
[1627.5, 0.934], [1627.8, 0.931], [1628.1, 0.929], [1628.3, 0.932],
[1628.7, 0.933], [1629.0, 0.934], [1629.4, 0.935], [1629.9, 0.935],
[1630.1, 0.930], [1630.4, 0.922], [1630.7, 0.926], [1631.0, 0.933],
[1631.3, 0.933], [1631.5, 0.933], [1631.8, 0.932], [1632.1, 0.921],
[1632.4, 0.912], [1632.7, 0.914], [1633.0, 0.919], [1633.2, 0.928],
[1633.4, 0.932], [1633.8, 0.933], [1634.4, 0.933], [1634.7, 0.928],
[1634.9, 0.919], [1635.2, 0.908], [1635.5, 0.916], [1635.8, 0.930],
[1636.1, 0.933], [1636.4, 0.930], [1636.7, 0.930], [1637.0, 0.934],
[1637.3, 0.921], [1637.6, 0.897], [1637.8, 0.910], [1638.1, 0.929],
[1638.3, 0.933], [1638.8, 0.931], [1639.0, 0.920], [1639.3, 0.898],
[1639.6, 0.903], [1639.9, 0.911], [1640.2, 0.879], [1640.5, 0.899],
[1640.7, 0.924], [1641.0, 0.927], [1641.4, 0.924], [1641.6, 0.922],
[1641.9, 0.922], [1642.2, 0.920], [1642.5, 0.898], [1642.8, 0.872],
[1643.1, 0.899], [1643.3, 0.923], [1643.6, 0.927], [1643.9, 0.929],
[1644.2, 0.930], [1644.8, 0.925], [1645.1, 0.897], [1645.3, 0.849],
[1645.6, 0.867], [1645.9, 0.910], [1646.2, 0.920], [1646.4, 0.925],
[1646.9, 0.928], [1647.3, 0.927], [1647.7, 0.916], [1648.0, 0.885],
[1648.2, 0.874], [1648.5, 0.910], [1648.7, 0.920], [1649.1, 0.916],
[1649.4, 0.913], [1649.6, 0.920], [1649.9, 0.926], [1650.0, 0.920] ]

plt.figure(figsize=(6.4, 4.2))
plt.gca().axvspan(1530, 1565, alpha=0.5, color='#aaaaaa')
plt.plot([lt[0] for lt in lambda_transmission], [lt[1] for lt in lambda_transmission])
plt.xlabel('wavelength [nm]')
plt.ylabel('atmosphere transmittance')
plt.xlim(1450, 1650)
plt.ylim(0, 1)
plt.grid()
plt.text(1547.5, 0.7, "C-band", ha="center", va="center", fontsize=15)
plt.tight_layout()
plt.savefig('Atmosphere-transmittance-1450-1650-Cband.svg')