<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-20 -051 14:40:00.000"
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="2 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" >
2026.02.20 (051) 14:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.14" 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">
FF202605102201440009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="9.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.516" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.529" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="5.600" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="210.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="210.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="100.000" 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="8.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="460.000" 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="3.388" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.359" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="352.859" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="234.829" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.415" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.500" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="148.312" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="39.949" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="84.978" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="195.920" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.320" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="4.700" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="94">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.1 9.15 9.2 9.25 9.3 9.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
210.000 220.000 225.000 238.750 252.500 266.250 280.000 285.417 290.833 296.250 301.667 307.083 312.500 317.917 323.333 328.750 334.167 339.583 345.000 345.000 347.500 350.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 355.000 357.500 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 380.000 380.000 390.000 390.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 435.000 435.000 440.000 445.000 450.000 455.000 460.000 460.000 465.000 470.000 475.000 480.000 485.000 490.000 495.000 500.000 505.000 510.000 515.000 521.261 528.115 535.650 543.973 553.215 563.535 575.136 588.271 603.267 620.547
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 54 51 0 0 0 45 0 0 0 0 0 0 0 0 0 0 0 54 51 0 57 57 0 57 60 54 54 57 57 60 0 54 57 57 57 54 57 60 57 54 60 60 57 60 54 60 57 51 48 54 48 57 48 57 60 57 57 60 54 57 54 57 54 51 51 54 57 57 51 57 57 57 57 51 60 63 60 63 60 0 60 51 60 63 63 63 60 63 63 54 48 45 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 0.390625 1.953125 0.390625 0.390625 0.390625 1.171875 1.953125 0.390625 -0.390625 1.171875 1.171875 2.734375 -1.953125 2.734375 1.171875 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 -1.953125 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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="43">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.000 109.000 108.000 107.000 106.000 105.000 105.000 105.000 100.000 101.000 102.000 103.000 104.000 105.000 100.000 100.000 100.000 100.000 103.333 106.667 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 0 0 0 57 57 54 48 0 0 0 0 60 48 51 51 48 0 0 51 51 0 0 0 0 0 0 0 0 0 45 48 0 51 51 0 0 0 0 0 51 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.953125 1.953125 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -1.171875 -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 0.390625 1.171875 -0.390625 -0.390625 1.171875 1.171875 0.390625 0.390625 0.390625 1.171875 -1.953125 1.171875 -1.171875 1.171875 -0.390625 1.171875 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" >
89.484 90.0 95.0 100.0 105.0 110.0 111.561 113.122 114.683 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 352.859 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.279 2.932 3.278 3.388 3.265 3.265 3.388 3.397 3.537 3.673 3.805 3.936 4.067 4.196 4.326 4.457 4.588 4.719 4.851 4.984 5.117 5.251 5.385 5.521 5.656 5.792 5.929 6.066 6.203 6.341 6.478 6.616 6.754 6.892 7.03 7.169 7.307 7.445 7.582 7.72 7.857 7.993 8.128 8.263 8.395 8.526 8.653 8.777 8.895 9.006 9.107 9.195 9.267 9.318 9.346 9.35 9.349 9.344 9.332 9.314 9.291 9.263 9.23 9.192 9.149 9.102 9.051 8.996 8.938 8.876 8.811 8.742 8.671 8.598 8.522 8.444 8.363 8.281 8.197 8.112 8.025 7.937 7.848 7.758 7.667 7.575 7.483 7.39 7.296 7.203 7.109 7.015 6.921 6.827 6.734 6.64 6.547 6.454 6.361 6.269 6.177 6.086 5.996 5.906 5.816 5.728 5.64 5.553 5.467 5.381 5.296 5.213 5.13 5.048 4.967 4.886 4.807 4.729 4.651 4.575 4.499 4.425 4.351 4.279 4.207 4.137 4.067 3.998 3.931 3.864 3.798 3.733 3.669 3.606 3.544 3.483 3.423 3.364 3.306 3.248 3.192 3.136 3.081 3.028 2.975 2.922 2.871 2.821 2.771 2.722 2.674 2.627 2.58 2.535 2.49 2.446 2.402 2.359 2.317 2.276 2.236 2.196 2.157 2.118 2.08 2.043 2.006 1.97 1.935 1.9 1.866 1.833 1.8 1.767 1.736 1.704 1.674 1.644 1.614 1.585 1.556 1.528 1.501 1.474 1.447 1.421

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.388" PeakHeight="110.0" Num="3" Error="0.0">
-30.499 13.149 -3.166
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.388" EndFrequency="9.35" PeakHeight="352.859" Num="5" zHalfNm="234.829" Error="7.511">
-202.711 -48.987 15.73 -3.022 0.814
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.683" Depth="0.123"/>
<TopsideChapman PeakHeight="352.859" PeakDensity="1084646.4" PeakScaleHeight="84.978" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
