<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-30 -089 16:50:00.000"
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="1 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other</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" >
2026.03.30 (089) 16:50:00</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">
FF202608903301650009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="12.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.449" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.507" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="3.200" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.410" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="350.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="350.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="100.216" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="96.408" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="6.246" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="525.000" 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="3.273" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.306" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="379.703" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="266.377" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.034" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="148.095" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="65.853" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="83.281" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="202.630" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.130" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="108">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
350.000 350.000 350.000 352.500 355.000 355.000 360.000 360.000 360.000 365.000 365.000 370.000 372.500 375.000 375.000 377.500 380.000 381.667 383.333 385.000 390.000 390.000 395.000 395.000 400.000 400.000 400.000 402.500 405.000 405.000 410.000 410.000 412.500 415.000 415.000 415.000 420.000 420.000 425.000 425.000 425.000 430.000 435.000 435.000 435.000 440.000 440.000 445.000 445.000 447.500 450.000 450.000 450.000 450.000 450.000 450.000 450.000 453.333 456.667 460.000 460.000 460.000 460.000 460.000 465.000 470.000 470.000 470.000 470.000 470.000 472.500 475.000 480.000 480.000 480.000 480.000 483.333 486.667 490.000 490.000 490.000 490.000 490.000 500.000 502.500 505.000 510.000 510.000 515.000 515.000 520.000 525.000 525.000 530.000 535.000 540.000 540.000 545.000 555.000 555.000 560.000 567.037 575.456 585.708 598.464 614.772 636.352 666.256
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 69 0 63 66 51 57 63 57 60 51 0 54 60 51 54 0 0 72 69 75 63 57 51 60 66 48 63 69 60 63 54 63 69 60 66 72 66 72 72 69 54 57 51 48 54 48 57 0 48 54 0 45 66 63 57 0 0 66 66 0 66 60 0 0 63 66 63 60 0 54 45 45 48 48 0 0 48 54 54 54 0 54 48 54 48 48 48 51 51 51 51 51 57 57 54 51 57 57 54 54 54 42 0 0 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 -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 1.171875 -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 -1.953125 -2.734375 -1.953125 -1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="5">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.2 3.25 3.3 3.35 3.4
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
100.216 101.540 103.206 105.486 109.243
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 54 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -0.390625 0.390625 -0.390625 2.734375
</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" >
90.0 95.0 96.408 98.442 100.0 100.477 102.511 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 379.703 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 3.32 3.41 3.282 3.282 3.282 3.41 3.5 3.684 3.866 4.045 4.219 4.388 4.552 4.713 4.87 5.024 5.176 5.326 5.474 5.621 5.766 5.912 6.056 6.201 6.345 6.49 6.635 6.781 6.928 7.076 7.225 7.375 7.527 7.68 7.835 7.992 8.151 8.312 8.475 8.641 8.809 8.98 9.154 9.33 9.509 9.69 9.874 10.06 10.248 10.437 10.626 10.814 11.0 11.181 11.354 11.518 11.667 11.798 11.906 11.986 12.035 12.05 12.05 12.045 12.032 12.012 11.984 11.948 11.906 11.858 11.803 11.742 11.676 11.605 11.528 11.447 11.362 11.273 11.179 11.083 10.983 10.88 10.774 10.666 10.556 10.443 10.329 10.213 10.095 9.977 9.857 9.736 9.614 9.492 9.369 9.246 9.123 8.999 8.876 8.752 8.629 8.506 8.384 8.261 8.14 8.019 7.899 7.779 7.661 7.543 7.426 7.31 7.195 7.082 6.969 6.857 6.747 6.637 6.529 6.422 6.317 6.212 6.109 6.007 5.906 5.807 5.709 5.612 5.517 5.422 5.33 5.238 5.148 5.059 4.971 4.885 4.8 4.716 4.633 4.552 4.472 4.393 4.316 4.239 4.164 4.09 4.017 3.946 3.875 3.806 3.738 3.671 3.605 3.54 3.477 3.414 3.352 3.292 3.232 3.174 3.116 3.06 3.004 2.95 2.896 2.843 2.792 2.741 2.691 2.642 2.593 2.546 2.5 2.454 2.409 2.365 2.321 2.279 2.237 2.196 2.156 2.116 2.077 2.039 2.001 1.965 1.928

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.41" PeakHeight="96.408" Num="3" Error="0.608">
-9.529 4.113 -0.992
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.41" EndFrequency="12.05" PeakHeight="379.703" Num="5" zHalfNm="266.377" Error="2.772">
-233.816 -65.522 22.682 1.006 -1.542
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.103" Depth="0.128"/>
<TopsideChapman PeakHeight="379.703" PeakDensity="1801519.9" PeakScaleHeight="83.281" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
