<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-21 -080 15:10:00.000"
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="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" >
2026.03.21 (080) 15:10:00</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">
FF202608003211510009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="10.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.488" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.374" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="3.050" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.560" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="295.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="295.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="100.558" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="98.901" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="8.667" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="545.973" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.407" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.368" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="349.472" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="233.787" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.288" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="140.338" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="44.826" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="79.074" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="196.370" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.140" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="102">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
295.000 295.000 295.000 300.000 301.250 302.500 303.750 305.000 305.000 305.000 310.000 310.000 312.500 315.000 315.000 315.000 315.000 316.667 318.333 320.000 321.667 323.333 325.000 330.000 331.667 333.333 335.000 336.667 338.333 340.000 341.667 343.333 345.000 346.667 348.333 350.000 355.000 355.000 355.000 360.000 360.000 365.000 365.000 370.000 370.000 370.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 410.000 410.000 415.000 415.000 425.000 425.000 430.000 435.000 435.000 445.000 450.000 455.000 455.000 460.000 465.000 470.000 475.000 485.000 485.000 490.000 490.000 500.000 505.000 505.000 510.000 515.000 515.000 520.000 525.000 525.000 530.000 530.000 530.000 532.500 535.000 540.000 540.000 540.000 542.743 545.973 549.834 554.529 560.364 567.809 577.638
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 48 51 0 0 0 54 51 48 54 54 0 51 54 54 48 0 0 0 45 0 48 45 0 0 0 0 0 0 0 0 0 0 0 60 51 0 69 63 69 60 69 63 72 72 72 63 72 66 72 69 69 66 66 69 66 66 69 69 66 63 63 66 66 66 63 66 66 66 66 66 66 63 60 66 66 63 57 57 54 60 63 60 57 51 54 54 60 63 0 57 60 63 57 54 54 0 57 45 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 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 1.953125 -2.734375 0.390625 0.390625 -2.734375 0.390625 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="11">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
100.558 101.174 101.848 102.592 103.425 104.371 105.471 106.789 108.449 110.721 114.470
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 54 0 51 54 0 0 0 48 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 -1.953125
</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 98.901 100.0 100.384 101.866 103.349 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 349.472 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 3.175 3.56 3.489 3.431 3.431 3.56 3.612 3.753 3.881 4.004 4.124 4.244 4.364 4.486 4.611 4.738 4.869 5.004 5.142 5.284 5.43 5.579 5.73 5.883 6.037 6.192 6.347 6.501 6.654 6.805 6.955 7.102 7.248 7.391 7.532 7.672 7.809 7.945 8.08 8.213 8.345 8.476 8.606 8.737 8.866 8.996 9.127 9.258 9.39 9.523 9.657 9.793 9.928 10.056 10.161 10.2 10.2 10.195 10.183 10.163 10.137 10.103 10.064 10.018 9.967 9.91 9.849 9.782 9.711 9.636 9.558 9.475 9.389 9.3 9.209 9.115 9.018 8.919 8.819 8.716 8.612 8.507 8.401 8.294 8.185 8.077 7.967 7.858 7.748 7.638 7.528 7.417 7.308 7.198 7.089 6.98 6.872 6.764 6.657 6.551 6.445 6.341 6.237 6.134 6.032 5.931 5.832 5.733 5.635 5.538 5.443 5.349 5.256 5.164 5.073 4.983 4.895 4.808 4.722 4.637 4.554 4.472 4.391 4.311 4.232 4.155 4.079 4.004 3.93 3.857 3.786 3.716 3.647 3.579 3.512 3.446 3.382 3.318 3.256 3.195 3.134 3.075 3.017 2.96 2.904 2.849 2.795 2.741 2.689 2.638 2.588 2.538 2.49 2.442 2.395 2.349 2.304 2.26 2.217 2.174 2.132 2.091 2.051 2.011 1.972 1.934 1.897 1.86 1.824 1.789 1.754 1.721 1.687 1.654 1.622 1.591 1.56 1.53 1.5 1.471 1.442 1.414 1.387 1.36 1.334 1.308 1.282

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.56" PeakHeight="98.901" Num="3" Error="1.15">
-13.267 5.774 -1.408
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.56" EndFrequency="10.2" PeakHeight="349.472" Num="5" zHalfNm="233.787" Error="6.529">
-193.538 -74.386 30.101 -12.966 4.666
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.448" Depth="0.129"/>
<TopsideChapman PeakHeight="349.472" PeakDensity="1290818.9" PeakScaleHeight="79.074" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
