<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-02 -092 14:30:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2o 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" >
2026.04.02 (092) 14:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.19" 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">
FF202609204021430009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="12.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.550" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.619" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="270.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="270.000" 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="11.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="480.000" 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="3.389" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.359" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="367.373" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="259.900" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.686" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="144.941" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="66.202" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="80.200" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="172.530" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.510" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="143">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 12.1 12.15 12.2 12.25 12.3 12.35 12.4
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 270.000 270.000 270.000 275.000 275.000 276.667 278.333 280.000 285.000 290.000 295.000 295.000 300.000 305.000 305.000 307.500 310.000 310.000 312.500 315.000 315.000 315.000 315.000 320.000 320.000 320.000 325.000 325.000 325.000 327.500 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 362.500 365.000 365.000 365.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 415.000 415.000 415.000 420.000 425.000 425.000 430.000 430.000 430.000 430.000 435.000 440.000 442.500 445.000 445.000 450.000 450.000 455.000 460.000 465.000 465.000 470.000 470.000 480.000 480.000 480.000 485.000 490.000 500.000 505.000 510.000 510.000 515.000 520.139 525.822 532.141 539.209 547.167 556.196 566.526 578.460 592.405 608.915 628.769 653.097
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 57 54 54 54 0 0 0 48 0 48 48 51 48 54 0 51 57 0 51 0 57 54 51 54 51 51 54 54 0 54 54 54 51 54 54 57 54 57 57 57 57 54 57 60 60 60 60 63 0 60 66 63 63 0 63 66 63 63 63 66 63 57 60 63 60 57 60 63 66 57 60 66 69 60 63 66 66 66 66 69 69 63 66 66 63 66 66 63 66 54 60 66 66 60 63 63 60 60 60 57 48 54 45 54 57 57 42 51 42 51 54 51 51 54 51 45 54 51 51 45 57 54 54 51 48 48 48 48 48 48 48 48 45 45 0 45 45 45 42 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 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 -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 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 -1.953125 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" >
89.484 90.0 95.0 100.0 105.0 110.0 111.556 113.113 114.669 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 367.373 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.28 2.933 3.279 3.389 3.266 3.266 3.389 3.402 3.59 3.761 3.923 4.08 4.235 4.39 4.545 4.702 4.86 5.022 5.185 5.353 5.523 5.698 5.876 6.059 6.246 6.437 6.632 6.831 7.034 7.241 7.451 7.665 7.882 8.102 8.324 8.547 8.773 8.999 9.226 9.452 9.678 9.903 10.126 10.346 10.563 10.775 10.981 11.181 11.372 11.554 11.723 11.879 12.019 12.14 12.24 12.318 12.371 12.397 12.4 12.399 12.389 12.371 12.344 12.309 12.267 12.217 12.16 12.097 12.027 11.951 11.87 11.784 11.693 11.598 11.498 11.394 11.287 11.177 11.063 10.947 10.829 10.708 10.585 10.46 10.334 10.207 10.078 9.948 9.818 9.687 9.556 9.424 9.292 9.16 9.028 8.896 8.765 8.634 8.503 8.374 8.244 8.116 7.988 7.862 7.736 7.612 7.488 7.366 7.244 7.124 7.006 6.888 6.772 6.657 6.543 6.431 6.321 6.211 6.103 5.997 5.892 5.788 5.686 5.585 5.486 5.388 5.292 5.197 5.103 5.011 4.92 4.831 4.743 4.657 4.572 4.488 4.406 4.325 4.245 4.167 4.09 4.014 3.94 3.867 3.795 3.724 3.655 3.586 3.519 3.453 3.389 3.325 3.263 3.201 3.141 3.082 3.024 2.967 2.911 2.856 2.801 2.748 2.696 2.645 2.595 2.546 2.497 2.45 2.403 2.358 2.313 2.269 2.225 2.183 2.141 2.1 2.06 2.021 1.982 1.944 1.907 1.871 1.835 1.8 1.765 1.732

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.389" PeakHeight="110.0" Num="3" Error="0.0">
-30.499 13.15 -3.167
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.389" EndFrequency="12.4" PeakHeight="367.373" Num="5" zHalfNm="259.9" Error="4.612">
-221.441 -40.093 7.804 -0.268 1.294
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.669" Depth="0.123"/>
<TopsideChapman PeakHeight="367.373" PeakDensity="1907692.2" PeakScaleHeight="80.2" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
