<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-21 -080 02:10:00.000"
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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: F2x cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Trace overlaps while constructing baseline</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" >
2026.03.21 (080) 02:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202608003210210009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="5.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.199" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="11.763" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="445.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="445.000" Name="h`F2" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="657.017" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="533.794" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="458.051" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.314" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="113.529" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.937" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="56.449" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="132.470" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.190" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="62">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.3 2.35 2.4 2.45 2.5 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 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
445.000 450.000 520.000 465.000 475.000 535.000 530.000 521.667 513.333 505.000 525.000 520.000 520.000 520.000 520.000 520.000 525.000 530.000 527.500 525.000 527.500 530.000 530.000 530.000 530.000 530.000 525.000 520.000 527.500 535.000 545.000 550.000 550.000 554.000 558.000 562.000 566.000 570.000 585.000 585.000 593.333 601.667 610.000 611.667 613.333 615.000 616.667 618.333 620.000 615.000 617.500 620.000 622.500 625.000 627.500 633.326 640.031 647.831 657.017 667.997 681.351 697.944
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51 51 51 51 51 57 0 0 60 57 60 54 0 60 57 0 57 0 60 60 60 57 60 60 60 57 60 0 57 63 54 54 0 0 0 0 54 57 57 0 0 51 0 0 0 54 0 48 54 0 0 0 51 0 0 0 0 51 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 -2.734375 -0.390625 -0.390625 -2.734375 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 2.734375 1.953125 1.171875 -2.734375 -0.390625 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 2.734375 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.953125 -1.171875 -1.171875 -1.171875 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 147.54 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 185.08 190.0 195.0 200.0 205.0 210.0 215.0 220.0 222.62 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 533.794 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.334 0.318 0.296 0.266 0.226 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.22 0.241 0.261 0.282 0.302 0.323 0.343 0.354 0.371 0.409 0.448 0.49 0.533 0.578 0.625 0.673 0.723 0.774 0.826 0.88 0.935 0.991 1.049 1.108 1.168 1.229 1.292 1.356 1.421 1.488 1.556 1.626 1.697 1.769 1.843 1.919 1.996 2.075 2.156 2.238 2.322 2.408 2.496 2.585 2.677 2.771 2.866 2.964 3.064 3.166 3.271 3.378 3.487 3.598 3.712 3.829 3.947 4.068 4.19 4.315 4.44 4.566 4.692 4.815 4.935 5.048 5.15 5.237 5.302 5.341 5.35 5.35 5.344 5.33 5.31 5.282 5.249 5.209 5.164 5.115 5.061 5.003 4.941 4.876 4.808 4.738 4.665 4.591 4.515 4.437 4.359 4.279 4.199 4.119 4.038 3.957 3.876 3.795 3.715 3.635 3.556 3.477 3.4 3.323 3.247 3.171 3.097 3.024 2.952 2.882 2.812 2.744 2.677 2.611 2.546 2.483 2.42 2.36 2.3 2.242 2.184 2.129 2.074 2.02 1.968 1.917 1.867 1.819 1.771 1.725 1.679 1.635 1.592 1.55 1.509 1.469 1.43 1.392 1.355 1.319 1.284 1.249 1.216 1.183 1.152 1.121 1.091 1.061 1.033 1.005 0.978 0.951 0.926 0.901 0.876 0.853 0.83 0.807 0.785 0.764 0.743 0.723 0.704 0.684 0.666

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="5.35" PeakHeight="533.794" Num="5" zHalfNm="458.051" Error="4.51">
-265.997 -73.275 34.535 -6.836 0.399
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="112.62" Depth="0.154"/>
<TopsideChapman PeakHeight="533.794" PeakDensity="355117.88" PeakScaleHeight="56.449" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
