<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-12 -071 18:50:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2o 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" >
2026.03.12 (071) 18:50:00</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">
FF202607103121850009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.585" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.955" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="470.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.823" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="365.752" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="261.147" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.581" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="141.732" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="51.794" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="76.882" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="163.850" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.550" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="141">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 247.500 250.000 255.000 257.500 260.000 262.500 265.000 260.000 265.000 266.250 267.500 268.750 270.000 270.000 272.500 275.000 275.000 280.000 280.000 280.000 282.857 285.714 288.571 291.429 294.286 297.143 300.000 302.500 305.000 305.000 305.000 305.000 305.000 305.000 305.000 306.667 308.333 310.000 310.000 310.000 312.500 315.000 315.000 320.000 322.500 325.000 325.000 325.000 325.000 330.000 330.000 330.000 332.500 335.000 335.000 335.000 337.500 340.000 340.000 340.000 342.500 345.000 347.500 350.000 350.000 350.000 355.000 360.000 360.000 362.500 365.000 365.000 367.500 370.000 370.000 375.000 375.000 375.000 380.000 380.000 382.500 385.000 385.000 387.500 390.000 395.000 395.000 395.000 400.000 400.000 402.500 405.000 410.000 410.000 410.000 415.000 417.500 420.000 420.000 420.000 420.000 425.000 430.000 430.000 430.000 432.500 435.000 440.000 440.000 440.000 442.500 445.000 445.000 445.000 445.000 448.571 452.143 455.714 459.286 462.857 466.429 470.000 470.000 475.000 480.000 483.750 487.500 491.250 495.000 502.497 510.632 519.491 529.173 539.801 551.518 564.503 578.972 595.195 613.512 634.356
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 57 54 0 0 0 48 54 57 0 0 0 57 51 0 54 51 57 57 57 0 0 0 0 0 0 54 0 48 54 60 60 60 60 54 0 0 60 57 54 0 60 60 63 0 54 60 45 63 57 0 63 0 57 0 63 0 60 0 60 0 60 0 60 63 60 0 51 57 45 54 60 0 60 66 57 63 69 60 66 57 66 66 60 66 57 63 66 63 66 60 69 57 63 66 60 0 51 63 69 66 0 51 60 63 0 60 51 57 63 54 63 63 60 51 60 0 57 57 54 54 54 51 0 45 0 0 0 48 48 0 0 0 0 0 0 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 1.171875 -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 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -2.734375 -1.953125 -1.171875 -2.734375 -1.171875 -1.171875 -1.171875 -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" >
89.576 90.0 95.0 100.0 105.0 110.0 114.024 115.0 118.048 120.0 122.072 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 365.752 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.235 1.897 2.444 2.731 2.823 2.701 2.701 2.701 2.76 2.823 2.91 3.055 3.2 3.344 3.491 3.641 3.794 3.951 4.112 4.278 4.449 4.625 4.806 4.991 5.181 5.375 5.573 5.774 5.978 6.184 6.393 6.603 6.813 7.025 7.237 7.449 7.66 7.871 8.081 8.291 8.498 8.704 8.909 9.111 9.31 9.506 9.699 9.887 10.07 10.246 10.414 10.573 10.719 10.852 10.967 11.063 11.135 11.181 11.2 11.2 11.197 11.185 11.164 11.135 11.098 11.054 11.004 10.946 10.882 10.812 10.737 10.657 10.572 10.482 10.388 10.291 10.19 10.086 9.979 9.869 9.756 9.642 9.526 9.408 9.289 9.168 9.046 8.924 8.801 8.677 8.553 8.428 8.304 8.18 8.056 7.932 7.808 7.685 7.563 7.441 7.321 7.2 7.081 6.963 6.846 6.73 6.615 6.501 6.388 6.277 6.167 6.058 5.951 5.844 5.74 5.636 5.534 5.434 5.334 5.237 5.14 5.045 4.952 4.86 4.769 4.68 4.592 4.505 4.42 4.337 4.254 4.173 4.094 4.016 3.939 3.863 3.789 3.716 3.644 3.574 3.505 3.437 3.37 3.304 3.24 3.177 3.115 3.054 2.994 2.936 2.878 2.821 2.766 2.712 2.658 2.606 2.554 2.504 2.455 2.406 2.358 2.312 2.266 2.221 2.177 2.134 2.091 2.05 2.009 1.969 1.93 1.892 1.854 1.817 1.781 1.745 1.711 1.676 1.643 1.61 1.578 1.546 1.516 1.485 1.456 1.427 1.398

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.823" PeakHeight="110.0" Num="3" Error="0.0">
-30.04 12.476 -2.86
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.823" EndFrequency="11.2" PeakHeight="365.752" Num="5" zHalfNm="261.147" Error="3.471">
-216.222 -35.864 10.857 -3.964 1.513
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.072" Depth="0.122"/>
<TopsideChapman PeakHeight="365.752" PeakDensity="1556327.5" PeakScaleHeight="76.882" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
