<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-29 -029 10:20:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="1 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 100%</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.01.29 (029) 10:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202602901291020009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="32" >
<URSI ID="00" Val="9.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.993" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.085" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.850" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.050" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.110" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="235.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="235.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="104.555" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="120.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="360.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="2.299" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="306.792" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="222.328" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.363" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.550" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="119.225" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="28.087" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="65.343" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="118.370" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.380" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="3.700" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="108">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
235.000 240.000 241.667 243.333 245.000 240.000 240.833 241.667 242.500 243.333 244.167 245.000 245.000 245.000 245.000 246.250 247.500 248.750 250.000 251.250 252.500 253.750 255.000 256.250 257.500 258.750 260.000 261.250 262.500 263.750 265.000 265.000 265.833 266.667 267.500 268.333 269.167 270.000 265.000 266.250 267.500 268.750 270.000 270.000 273.333 276.667 280.000 280.000 280.000 285.000 285.000 285.000 287.500 290.000 290.000 290.000 290.000 290.000 290.000 295.000 297.500 300.000 300.000 301.667 303.333 305.000 305.000 305.000 310.000 310.000 310.000 315.000 315.000 320.000 320.000 320.000 325.000 325.000 330.000 330.000 330.000 335.000 335.000 340.000 345.000 345.000 350.000 350.000 355.000 360.000 360.000 360.000 370.000 373.181 376.732 380.719 385.230 390.374 396.294 403.181 411.294 420.989 432.782 447.435 466.132 490.816 524.911 575.064
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 54 0 0 48 57 0 57 0 0 0 0 66 63 66 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 60 66 0 0 0 0 0 66 66 0 0 0 0 69 0 0 66 69 69 57 60 60 0 54 57 57 54 72 75 72 0 66 72 54 0 63 69 72 69 72 75 69 72 60 66 60 54 63 57 60 66 69 69 69 57 63 48 66 69 66 72 75 72 72 69 69 69 69 66 63 66 66 66 63 63 54 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -1.171875 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="2">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.05 2.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
104.555 109.389
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="47">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
105.000 105.000 104.000 103.000 102.000 101.000 100.000 110.000 110.000 109.167 108.333 107.500 106.667 105.833 105.000 110.000 108.333 106.667 105.000 110.000 110.000 112.500 115.000 115.000 115.000 115.000 115.000 117.000 119.000 121.000 123.000 125.000 130.000 128.333 126.667 125.000 125.000 120.000 120.000 117.500 115.000 112.500 110.000 120.000 116.667 113.333 110.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 0 0 0 0 60 66 63 0 63 0 66 0 75 63 0 0 0 66 57 0 0 0 0 0 0 0 0 0 0 45 48 0 0 54 48 51 54 0 51 51 54 48 0 0 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 0.390625 2.734375 0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -1.171875 0.390625 0.390625 0.390625 1.171875 -0.390625 0.390625 0.390625 -2.734375 0.390625 0.390625 0.390625 0.390625 0.390625 -1.171875 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.731 90.0 95.0 100.0 105.0 110.0 115.0 116.611 120.0 123.221 125.0 129.832 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 306.792 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.223 1.415 1.827 2.042 2.11 2.044 1.993 1.993 1.993 2.024 2.11 2.117 2.318 2.511 2.701 2.891 3.082 3.277 3.477 3.684 3.897 4.12 4.351 4.594 4.847 5.112 5.387 5.672 5.964 6.261 6.557 6.849 7.13 7.397 7.646 7.875 8.083 8.269 8.433 8.576 8.699 8.803 8.888 8.954 9.003 9.034 9.049 9.05 9.048 9.036 9.015 8.985 8.947 8.9 8.846 8.785 8.718 8.644 8.565 8.481 8.392 8.299 8.202 8.102 7.998 7.892 7.783 7.673 7.56 7.446 7.33 7.214 7.097 6.979 6.861 6.743 6.625 6.507 6.389 6.272 6.155 6.039 5.924 5.81 5.697 5.585 5.474 5.364 5.256 5.149 5.043 4.939 4.836 4.735 4.635 4.537 4.441 4.346 4.252 4.16 4.07 3.981 3.894 3.809 3.725 3.643 3.562 3.482 3.405 3.329 3.254 3.181 3.109 3.039 2.97 2.903 2.837 2.772 2.709 2.647 2.586 2.527 2.469 2.412 2.357 2.302 2.249 2.197 2.147 2.097 2.048 2.001 1.954 1.909 1.865 1.821 1.779 1.737 1.697 1.657 1.619 1.581 1.544 1.508 1.472 1.438 1.404 1.371 1.339 1.308 1.277 1.247 1.218 1.189 1.161 1.134 1.108 1.081 1.056 1.031 1.007 0.983 0.96 0.938 0.915 0.894 0.873 0.852 0.832 0.813 0.794 0.775 0.757 0.739 0.721 0.704 0.688 0.671 0.656 0.64 0.625 0.61 0.596 0.582 0.568 0.555 0.542

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.11" PeakHeight="110.0" Num="3" Error="0.0">
-29.229 11.336 -2.376
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.11" EndFrequency="9.05" PeakHeight="306.792" Num="5" zHalfNm="222.328" Error="1.589">
-178.859 5.549 -7.793 4.77 -0.627
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="19.832" Depth="0.117"/>
<TopsideChapman PeakHeight="306.792" PeakDensity="1016160.06" PeakScaleHeight="65.343" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
