<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-15 -074 08:50:00.000"
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" >
2026.03.15 (074) 08:50:00</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">
FF202607403150850009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="5.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.121" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="17.632" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.450" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="120.000" Name="h`Es" 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="5.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="335.000" 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="0.822" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="310.956" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="233.195" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.826" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.050" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="110.620" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="9.772" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="60.354" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="85.880" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="5.510" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="2.550" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="63">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 242.500 240.000 240.000 241.000 242.000 243.000 244.000 245.000 245.833 246.667 247.500 248.333 249.167 250.000 250.833 251.667 252.500 253.333 254.167 255.000 260.000 260.000 260.000 260.000 260.000 265.000 265.000 265.000 270.000 270.000 270.000 275.000 275.000 275.000 280.000 280.000 285.000 285.000 285.000 290.000 290.000 295.000 300.000 300.000 305.000 305.000 310.000 315.000 320.000 325.000 330.000 335.000 345.000 350.000 363.333 375.433 389.894 407.483 429.336 457.221 494.031 544.870
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 72 78 0 0 66 0 78 0 0 0 0 0 0 0 0 0 75 0 78 69 0 75 78 75 69 72 72 60 66 69 72 78 81 75 75 63 66 72 69 72 69 60 69 60 57 57 0 63 66 63 63 60 51 0 0 66 66 63 48 0 48
</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 -1.171875 0.390625 1.171875 1.171875 -2.734375 -2.734375 2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="29">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
130.000 130.000 125.000 124.167 123.333 122.500 121.667 120.833 120.000 125.000 127.000 129.000 131.000 133.000 135.000 130.000 120.000 120.000 130.000 125.000 125.000 125.000 125.000 130.000 135.000 132.500 130.000 132.500 135.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 57 0 0 0 0 0 0 0 0 0 0 0 0 66 63 0 69 0 72 0 75 72 66 0 57 69 0 63
</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 1.171875 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 1.171875 0.390625 1.171875 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.509 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 132.401 135.0 140.0 145.0 150.0 154.801 155.0 160.0 165.0 170.0 175.0 177.202 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 310.956 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.546 0.712 0.796 0.822 0.809 0.768 0.696 0.581 0.501 0.501 0.501 0.501 0.501 0.501 0.504 0.575 0.647 0.719 0.79 0.822 0.869 0.974 1.11 1.284 1.502 1.765 2.082 2.461 2.898 3.353 3.767 4.112 4.392 4.622 4.812 4.972 5.106 5.221 5.317 5.399 5.467 5.523 5.568 5.603 5.628 5.644 5.65 5.65 5.648 5.638 5.622 5.599 5.57 5.535 5.496 5.451 5.402 5.349 5.292 5.231 5.168 5.102 5.033 4.962 4.889 4.815 4.739 4.662 4.585 4.506 4.427 4.347 4.267 4.187 4.108 4.028 3.948 3.869 3.791 3.713 3.636 3.559 3.483 3.409 3.335 3.262 3.19 3.119 3.049 2.98 2.912 2.846 2.78 2.716 2.653 2.591 2.53 2.47 2.412 2.354 2.298 2.243 2.189 2.136 2.085 2.034 1.984 1.936 1.889 1.842 1.797 1.753 1.71 1.668 1.626 1.586 1.547 1.508 1.471 1.434 1.398 1.363 1.329 1.296 1.263 1.232 1.201 1.171 1.141 1.112 1.084 1.057 1.03 1.004 0.979 0.954 0.93 0.906 0.884 0.861 0.839 0.818 0.797 0.777 0.757 0.738 0.719 0.701 0.683 0.666 0.649 0.632 0.616 0.601 0.585 0.57 0.556 0.542 0.528 0.515 0.501 0.489 0.476 0.464 0.452 0.441 0.429 0.419 0.408 0.397 0.387 0.377 0.368 0.358 0.349 0.34 0.332 0.323 0.315 0.307 0.299 0.291 0.284 0.277 0.27 0.263

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.822" PeakHeight="110.0" Num="3" Error="0.0">
-25.554 7.023 -0.96
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.822" EndFrequency="5.65" PeakHeight="310.956" Num="5" zHalfNm="233.195" Error="2.454">
-163.495 49.008 -23.917 6.39 -1.74
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="67.202" Depth="0.321"/>
<TopsideChapman PeakHeight="310.956" PeakDensity="396060.78" PeakScaleHeight="60.354" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
