<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-24 -083 10:30:00.000"
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: 95% PACIFIC flags: Multiple candidates for F2x cusp</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" >
2026.03.24 (083) 10:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608303241030009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.066" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.820" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="230.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="230.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="365.000" 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="2.457" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="288.353" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="223.090" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.684" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="88.854" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="23.328" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="48.725" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="97.940" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.740" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="123">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 9.4
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 230.000 230.000 230.000 230.000 230.000 230.000 235.000 235.000 235.000 235.000 240.000 240.000 240.000 242.000 244.000 246.000 248.000 250.000 245.000 245.000 246.667 248.333 250.000 250.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 256.667 258.333 260.000 261.667 263.333 265.000 265.000 265.000 265.000 265.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 271.250 272.500 273.750 275.000 280.000 281.000 282.000 283.000 284.000 285.000 290.000 290.000 290.000 290.000 290.000 290.000 292.500 295.000 297.500 300.000 300.000 300.000 300.000 305.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 315.000 315.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 330.000 330.000 330.000 335.000 335.000 335.000 340.000 340.000 345.000 345.000 350.000 350.000 355.000 355.000 360.000 365.000 365.000 365.000 375.000 375.000 380.000 385.000 390.000 395.000 400.000 410.000 425.000 440.000 470.024
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 60 60 60 63 60 57 60 63 60 57 0 60 0 0 57 0 0 57 48 0 0 63 60 66 0 66 66 63 60 63 60 51 45 63 0 63 0 63 66 0 63 63 0 0 66 66 0 66 63 60 51 45 0 0 60 66 0 0 0 45 66 57 0 63 69 0 69 0 69 0 60 63 66 69 57 63 69 69 72 66 69 72 72 69 69 60 66 69 69 66 69 72 66 72 72 69 72 72 72 72 66 69 66 69 66 69 69 63 69 66 63 69 69 69 69 66 66 63 63 60 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 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 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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="181">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.648 90.0 95.0 100.0 105.0 110.0 115.0 115.799 120.0 121.597 125.0 127.396 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 288.353 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.23 1.649 2.127 2.377 2.457 2.364 2.332 2.332 2.332 2.405 2.457 2.54 2.69 2.836 2.982 3.132 3.287 3.45 3.623 3.807 4.005 4.218 4.447 4.694 4.958 5.238 5.532 5.835 6.145 6.456 6.764 7.068 7.365 7.652 7.929 8.193 8.443 8.675 8.885 9.068 9.218 9.327 9.388 9.4 9.399 9.383 9.35 9.301 9.236 9.157 9.066 8.964 8.851 8.729 8.599 8.462 8.319 8.171 8.018 7.862 7.703 7.542 7.379 7.215 7.05 6.885 6.721 6.557 6.395 6.234 6.074 5.916 5.76 5.607 5.456 5.307 5.161 5.018 4.877 4.739 4.605 4.473 4.344 4.218 4.095 3.975 3.858 3.744 3.633 3.525 3.419 3.317 3.217 3.12 3.025 2.933 2.844 2.757 2.673 2.591 2.511 2.434 2.359 2.286 2.216 2.147 2.081 2.016 1.954 1.893 1.834 1.777 1.722 1.668 1.616 1.565 1.517 1.469 1.423 1.379 1.335 1.294 1.253 1.214 1.176 1.139 1.103 1.068 1.035 1.002 0.971 0.94 0.911 0.882 0.854 0.827 0.801 0.776 0.752 0.728 0.705 0.683 0.661 0.641 0.62 0.601 0.582 0.564 0.546 0.529 0.512 0.496 0.48 0.465 0.45 0.436 0.422 0.409 0.396 0.384 0.372 0.36 0.349 0.338 0.327 0.317 0.307 0.297 0.288 0.278 0.27 0.261 0.253 0.245 0.237 0.23 0.222 0.215 0.209 0.202

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.457" PeakHeight="110.0" Num="3" Error="0.0">
-29.667 11.943 -2.628
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.457" EndFrequency="9.4" PeakHeight="288.353" Num="5" zHalfNm="223.09" Error="2.093">
-137.166 -24.366 0.673 -1.894 1.796
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="17.396" Depth="0.125"/>
<TopsideChapman PeakHeight="288.353" PeakDensity="1096277.9" PeakScaleHeight="48.725" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
