<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-14 -073 09:50:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.03.14 (073) 09:50:00</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">
FF202607303140950009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.327" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.610" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.950" 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="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="0.550" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="311.442" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.989" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="281.668" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="215.889" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.816" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="95.746" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="23.943" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="54.240" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="76.910" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.180" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="109">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.1 9.15 9.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 245.000 245.000 245.000 245.000 245.000 240.000 240.000 240.000 240.556 241.111 241.667 242.222 242.778 243.333 243.889 244.444 245.000 245.556 246.111 246.667 247.222 247.778 248.333 248.889 249.444 250.000 250.556 251.111 251.667 252.222 252.778 253.333 253.889 254.444 255.000 255.556 256.111 256.667 257.222 257.778 258.333 258.889 259.444 260.000 260.556 261.111 261.667 262.222 262.778 263.333 263.889 264.444 265.000 265.000 265.000 265.000 267.500 270.000 270.000 270.000 270.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 280.000 280.000 277.500 275.000 280.000 280.000 282.500 285.000 285.000 285.000 287.500 290.000 290.000 292.500 295.000 295.000 295.000 300.000 300.000 300.000 305.000 315.000 305.000 308.021 311.442 315.346 319.844 325.084 331.264 338.663 347.682 358.916 373.298 392.365 418.851 458.135 522.444 646.871
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 63 66 63 63 63 51 57 54 72 0 48 0 60 54 0 54 54 54 57 48 57 57 0 57 0 0 54 0 75 78 0 0 0 0 0 0 0 57 0 0 0 60 0 0 0 0 0 69 57 60 0 0 54 63 69 75 0 66 63 69 66 57 60 0 63 54 72 0 75 72 72 69 60 66 66 75 63 69 0 72 69 78 72 54 72 66 78 75 0 72 72 60 75 69 0 66 72 57 0 66 54 57 60 57 57 57 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 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 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
</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" >
89.763 90.0 95.0 100.0 105.0 110.0 115.0 118.271 120.0 125.0 126.542 130.0 134.813 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 281.668 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.22 1.333 1.723 1.925 1.989 1.941 1.856 1.856 1.856 1.856 1.912 1.989 1.996 2.214 2.454 2.692 2.921 3.143 3.362 3.583 3.807 4.04 4.285 4.547 4.832 5.148 5.508 5.925 6.412 6.951 7.468 7.894 8.223 8.474 8.67 8.822 8.942 9.035 9.104 9.154 9.185 9.199 9.2 9.197 9.179 9.149 9.105 9.049 8.982 8.905 8.819 8.724 8.621 8.512 8.397 8.276 8.15 8.02 7.886 7.75 7.611 7.47 7.328 7.184 7.04 6.895 6.75 6.606 6.462 6.318 6.176 6.035 5.895 5.757 5.62 5.485 5.352 5.221 5.092 4.965 4.841 4.718 4.598 4.48 4.365 4.252 4.141 4.032 3.926 3.822 3.721 3.622 3.525 3.43 3.338 3.248 3.16 3.074 2.99 2.909 2.829 2.752 2.676 2.602 2.531 2.461 2.393 2.326 2.262 2.199 2.138 2.078 2.02 1.964 1.909 1.856 1.804 1.753 1.704 1.656 1.61 1.565 1.521 1.478 1.436 1.396 1.357 1.318 1.281 1.245 1.21 1.176 1.143 1.11 1.079 1.048 1.019 0.99 0.962 0.935 0.908 0.883 0.858 0.833 0.81 0.787 0.765 0.743 0.722 0.701 0.682 0.662 0.643 0.625 0.608 0.59 0.574 0.557 0.541 0.526 0.511 0.497 0.483 0.469 0.456 0.443 0.43 0.418 0.406 0.395 0.383 0.372 0.362 0.352 0.342 0.332 0.323 0.313 0.304 0.296 0.287 0.279 0.271 0.264 0.256 0.249 0.242

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.989" PeakHeight="110.0" Num="3" Error="0.0">
-29.053 11.095 -2.279
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.989" EndFrequency="9.2" PeakHeight="281.668" Num="5" zHalfNm="215.889" Error="4.526">
-152.828 16.045 -19.586 13.18 -3.666
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="24.813" Depth="0.133"/>
<TopsideChapman PeakHeight="281.668" PeakDensity="1050124.1" PeakScaleHeight="54.24" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
