<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-03 -062 11:00:00.000"
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" >
2026.03.03 (062) 11:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606203031100009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="10.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.781" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.502" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.350" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.610" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="225.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="225.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="104.137" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="99.663" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="9.482" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="430.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.658" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="319.836" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="238.489" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.017" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="108.594" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="33.677" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="58.833" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="130.480" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.400" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="135">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
225.000 230.000 230.000 230.000 228.333 226.667 225.000 225.000 235.000 235.000 235.000 235.000 235.000 240.000 240.000 245.000 245.000 250.000 255.000 255.000 256.250 257.500 258.750 260.000 265.000 265.000 265.000 265.000 265.000 265.000 270.000 270.000 270.000 275.000 276.250 277.500 278.750 280.000 281.250 282.500 283.750 285.000 286.250 287.500 288.750 290.000 290.000 295.000 296.667 298.333 300.000 300.000 300.000 300.000 302.500 305.000 305.000 305.000 305.000 306.667 308.333 310.000 315.000 316.667 318.333 320.000 320.000 320.000 320.000 325.000 325.000 320.000 325.000 325.000 325.000 330.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 350.000 352.500 355.000 355.000 360.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 411.667 413.333 415.000 420.000 420.000 425.000 430.000 430.000 435.000 440.000 445.000 445.000 450.000 455.000 465.000 470.000 475.000 485.000 498.401 516.093
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 54 0 57 0 0 57 45 60 54 66 66 75 75 75 72 75 72 57 66 0 0 0 69 60 45 72 75 72 69 72 0 72 0 0 0 0 0 0 0 0 0 0 0 0 66 66 57 0 0 48 0 0 63 0 54 63 66 69 0 0 66 54 0 0 48 54 60 63 48 51 57 60 51 57 63 48 54 60 63 57 60 63 60 66 66 66 66 0 57 63 60 66 69 69 69 69 66 69 63 69 69 69 69 66 69 63 69 63 66 54 54 57 57 54 0 0 54 57 60 60 57 63 60 57 51 54 48 57 51 51 51 48 51 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -1.953125 0.390625 -2.734375 -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 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 -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 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 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="6">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.35 2.4 2.45 2.5 2.55 2.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
104.137 105.860 107.767 109.900 112.327 115.145
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 0 0 0 54
</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
</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 99.663 100.0 104.469 105.0 109.276 110.0 114.082 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 319.836 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.272 2.61 2.609 2.489 2.489 2.489 2.507 2.61 2.635 2.769 2.9 3.031 3.165 3.302 3.444 3.592 3.746 3.908 4.077 4.255 4.441 4.635 4.838 5.047 5.263 5.484 5.71 5.938 6.168 6.399 6.629 6.86 7.089 7.317 7.543 7.767 7.99 8.211 8.43 8.646 8.861 9.072 9.278 9.479 9.671 9.85 10.009 10.137 10.221 10.25 10.25 10.242 10.221 10.187 10.141 10.084 10.016 9.938 9.851 9.756 9.654 9.545 9.429 9.308 9.183 9.052 8.918 8.781 8.641 8.498 8.354 8.208 8.061 7.913 7.764 7.615 7.467 7.318 7.171 7.023 6.877 6.732 6.589 6.446 6.305 6.166 6.029 5.893 5.76 5.628 5.498 5.371 5.245 5.122 5.001 4.882 4.765 4.651 4.539 4.429 4.321 4.215 4.112 4.011 3.911 3.815 3.72 3.627 3.536 3.448 3.361 3.277 3.194 3.113 3.034 2.957 2.882 2.809 2.737 2.667 2.599 2.533 2.468 2.404 2.343 2.282 2.224 2.166 2.111 2.056 2.003 1.951 1.901 1.852 1.804 1.757 1.711 1.667 1.624 1.581 1.54 1.5 1.461 1.423 1.386 1.35 1.315 1.281 1.247 1.215 1.183 1.152 1.122 1.093 1.064 1.037 1.009 0.983 0.957 0.932 0.908 0.884 0.861 0.839 0.817 0.795 0.775 0.754 0.735 0.715 0.697 0.678 0.661 0.643 0.627 0.61 0.594 0.579 0.563 0.549 0.534 0.52 0.507 0.493 0.481 0.468 0.456

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.61" PeakHeight="99.663" Num="3" Error="2.208">
-14.142 5.772 -1.293
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.61" EndFrequency="10.25" PeakHeight="319.836" Num="5" zHalfNm="238.489" Error="3.302">
-170.098 -43.718 11.717 -5.971 2.316
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="14.419" Depth="0.121"/>
<TopsideChapman PeakHeight="319.836" PeakDensity="1303505.0" PeakScaleHeight="58.833" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
