<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-24 -083 18:30:00.000"
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" >
2026.03.24 (083) 18:30:00</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">
FF202608303241830009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="11.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.511" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.630" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.700" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="506.925" 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="2.910" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.129" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="376.312" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="270.898" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.514" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="140.295" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="53.728" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="76.076" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="174.620" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.300" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="132">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.25 11.3 11.35 11.4
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 270.000 275.000 280.000 280.000 280.000 280.000 285.000 285.000 285.000 290.000 291.250 292.500 293.750 295.000 295.000 300.000 300.000 305.000 305.000 305.000 306.667 308.333 310.000 310.000 315.000 320.000 325.000 325.000 325.000 325.000 330.000 330.000 335.000 337.500 340.000 340.000 340.000 340.000 345.000 345.000 350.000 350.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 377.500 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 402.500 405.000 405.000 405.000 410.000 415.000 415.000 415.000 420.000 420.000 420.000 425.000 430.000 432.500 435.000 430.000 435.000 435.000 435.000 435.000 440.000 440.000 440.000 442.500 445.000 447.500 450.000 450.000 452.500 455.000 455.000 460.000 460.000 465.000 466.250 467.500 468.750 470.000 470.000 475.000 480.000 480.000 485.000 485.000 485.000 490.000 495.000 495.000 495.000 498.719 502.685 506.925 511.469 516.349 521.605 527.282 533.433 540.119 547.413 555.402 564.192 573.908 584.705 596.773 610.352 625.745
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 54 48 57 57 57 54 60 60 54 0 0 0 60 60 60 51 60 66 66 0 0 63 63 0 63 54 57 60 60 60 60 57 0 57 63 69 66 66 66 63 66 57 60 51 57 66 54 63 51 60 51 60 63 0 63 66 60 66 63 69 60 69 60 63 0 60 69 69 66 57 57 66 63 66 72 72 60 0 48 66 60 0 54 60 72 72 72 0 75 0 69 63 0 63 69 66 72 60 0 48 0 60 57 57 57 57 60 57 57 54 54 48 51 48 51 0 0 0 0 0 51 48 45 0 45 0 42 48 45 42
</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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 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 -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 -1.953125 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 1.171875 -1.171875 0.390625 0.390625 -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" >
89.561 90.0 95.0 100.0 105.0 110.0 113.621 115.0 117.242 120.0 120.863 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 376.312 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.236 1.956 2.519 2.815 2.91 2.788 2.788 2.788 2.881 2.91 3.038 3.189 3.339 3.489 3.641 3.794 3.95 4.108 4.269 4.432 4.599 4.767 4.938 5.111 5.286 5.463 5.642 5.822 6.003 6.184 6.367 6.55 6.734 6.918 7.102 7.287 7.472 7.657 7.842 8.028 8.213 8.399 8.585 8.77 8.956 9.142 9.328 9.513 9.698 9.882 10.065 10.246 10.423 10.597 10.764 10.923 11.068 11.195 11.297 11.367 11.399 11.4 11.397 11.386 11.365 11.336 11.299 11.254 11.202 11.143 11.078 11.006 10.929 10.846 10.759 10.666 10.57 10.469 10.365 10.258 10.147 10.034 9.918 9.8 9.681 9.559 9.436 9.312 9.187 9.06 8.934 8.806 8.678 8.551 8.423 8.295 8.167 8.04 7.913 7.787 7.661 7.536 7.412 7.289 7.167 7.045 6.925 6.806 6.688 6.572 6.456 6.342 6.23 6.118 6.008 5.9 5.793 5.687 5.583 5.48 5.379 5.279 5.18 5.084 4.988 4.894 4.802 4.711 4.621 4.533 4.447 4.361 4.278 4.195 4.114 4.035 3.957 3.88 3.804 3.73 3.657 3.586 3.516 3.447 3.379 3.313 3.247 3.183 3.12 3.059 2.998 2.939 2.88 2.823 2.767 2.712 2.658 2.605 2.553 2.502 2.452 2.403 2.355 2.308 2.262 2.216 2.172 2.128 2.086 2.044 2.003 1.963 1.923 1.884 1.846 1.809 1.773 1.737 1.702 1.668 1.634 1.601 1.569 1.537 1.506 1.476 1.446

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.91" PeakHeight="110.0" Num="3" Error="0.0">
-30.118 12.59 -2.911
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.91" EndFrequency="11.4" PeakHeight="376.312" Num="5" zHalfNm="270.898" Error="2.323">
-218.147 -53.814 21.019 -6.042 1.535
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="10.863" Depth="0.122"/>
<TopsideChapman PeakHeight="376.312" PeakDensity="1612407.0" PeakScaleHeight="76.076" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
