<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-09 -040 10:40:00.000"
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" >
2026.02.09 (040) 10:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202604002091040009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="8.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.011" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.199" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.750" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.600" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.660" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="113.674" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="135.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="350.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.477" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="303.356" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="211.734" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.803" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.700" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="129.001" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="28.600" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="71.997" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="125.260" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.620" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="92">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 245.000 245.000 245.000 245.000 245.000 250.000 250.000 250.000 250.000 255.000 255.000 255.000 255.000 260.000 260.000 260.000 260.000 260.000 262.500 265.000 265.000 265.000 265.000 265.000 265.000 267.500 270.000 272.500 275.000 275.000 275.000 275.000 275.000 275.000 277.500 280.000 280.000 281.667 283.333 285.000 287.500 290.000 292.500 295.000 295.000 295.000 295.000 300.000 300.000 300.000 302.500 305.000 305.000 305.000 310.000 310.000 310.000 310.000 315.000 315.000 320.000 320.000 320.000 325.000 330.000 330.000 335.000 335.000 340.000 340.000 345.000 345.000 350.000 350.000 360.000 363.181 366.732 370.719 375.230 380.374 386.294 393.181 401.294 410.989 422.782 437.435 456.132 480.816 514.911 565.064 646.116
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 66 69 69 63 57 63 60 0 57 63 63 66 63 60 60 57 57 60 0 63 0 63 60 54 51 0 0 0 60 63 66 66 66 63 0 66 66 0 0 63 54 57 0 45 51 0 63 48 51 54 0 48 54 63 54 60 66 66 63 69 63 69 66 66 60 69 60 69 66 72 69 69 72 72 72 69 72 69 69 69 66 60 66 63 63 57 54 51 48 51 45
</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 -1.953125 -0.390625 0.390625 0.390625 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 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 2.734375 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="2">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.6 2.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
113.674 119.397
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54
</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="22">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
125.000 130.000 130.000 130.000 135.000 140.000 145.000 144.000 143.000 142.000 141.000 140.000 140.000 140.000 135.000 135.000 135.000 140.000 136.667 133.333 130.000 130.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 48 51 63 54 0 51 0 0 0 0 57 66 66 63 60 60 51 0 0 57 57
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 0.390625 0.390625 0.390625 0.390625 -1.953125 -0.390625 2.734375 -0.390625 2.734375 2.734375 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625
</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" >
89.608 90.0 95.0 100.0 105.0 110.0 115.0 115.698 120.0 121.396 125.0 127.094 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 303.356 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.232 1.787 2.303 2.574 2.66 2.557 2.526 2.526 2.526 2.611 2.66 2.785 2.985 3.174 3.357 3.537 3.717 3.898 4.083 4.271 4.465 4.666 4.874 5.092 5.319 5.557 5.805 6.061 6.324 6.588 6.848 7.099 7.334 7.55 7.745 7.919 8.072 8.204 8.319 8.416 8.498 8.564 8.617 8.656 8.683 8.697 8.7 8.7 8.693 8.679 8.657 8.628 8.593 8.551 8.504 8.451 8.393 8.33 8.262 8.19 8.115 8.036 7.953 7.868 7.78 7.69 7.597 7.503 7.406 7.309 7.209 7.109 7.008 6.907 6.804 6.701 6.598 6.495 6.392 6.289 6.186 6.084 5.982 5.88 5.779 5.679 5.579 5.481 5.383 5.286 5.19 5.095 5.001 4.908 4.817 4.726 4.637 4.549 4.462 4.376 4.291 4.208 4.126 4.045 3.966 3.887 3.81 3.734 3.66 3.587 3.515 3.444 3.374 3.306 3.239 3.173 3.108 3.045 2.982 2.921 2.861 2.802 2.744 2.687 2.632 2.577 2.524 2.471 2.42 2.369 2.32 2.271 2.224 2.177 2.131 2.087 2.043 2.0 1.958 1.916 1.876 1.836 1.798 1.76 1.722 1.686 1.65 1.615 1.581 1.548 1.515 1.483 1.451 1.42 1.39 1.36 1.331 1.303 1.275 1.248 1.222 1.196 1.17 1.145 1.121 1.097 1.073 1.05 1.028 1.006 0.985 0.964 0.943 0.923 0.903 0.884 0.865 0.846 0.828 0.81 0.793 0.776 0.76 0.743 0.727 0.712 0.697

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.66" PeakHeight="110.0" Num="3" Error="0.0">
-29.881 12.249 -2.76
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.66" EndFrequency="8.7" PeakHeight="303.356" Num="5" zHalfNm="211.734" Error="2.503">
-179.373 8.372 -10.803 6.481 -0.939
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="17.094" Depth="0.134"/>
<TopsideChapman PeakHeight="303.356" PeakDensity="939081.9" PeakScaleHeight="71.997" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
