<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-29 -088 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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x 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" >
2026.03.29 (088) 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">
FF202608803291830009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="13.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.657" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="36.002" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="8.600" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="13.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="385.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="385.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="110.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="12.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="460.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.899" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="355.554" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="265.759" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.515" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.550" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="123.105" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="66.164" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="66.163" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="154.110" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.250" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="8.150" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="109">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 12.45 12.5 12.55 12.6 12.65 12.7 12.75 12.8 12.85 12.9 12.95 13.0 13.05 13.1 13.15 13.2 13.25 13.3 13.35 13.4 13.45 13.5 13.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
385.000 385.000 385.000 385.000 385.000 385.000 385.000 395.000 395.000 395.000 395.000 400.000 400.000 395.000 390.000 390.000 390.000 392.500 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 400.000 400.000 400.000 400.000 400.000 400.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 410.000 410.000 411.667 413.333 415.000 415.000 417.500 420.000 420.000 420.000 420.000 420.000 420.000 420.000 425.000 425.000 425.000 430.000 430.000 425.000 425.000 435.000 440.000 440.000 440.000 440.000 445.000 445.000 445.000 450.000 452.500 455.000 460.000 460.000 460.000 470.000 470.000 475.000 475.000 480.000 485.000 490.000 490.000 494.715 500.200 506.661 514.382 523.774 535.443 550.333 569.991 597.142
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 60 63 63 60 60 54 63 69 63 63 51 51 0 69 66 69 0 69 69 69 69 69 69 69 69 69 69 66 66 66 66 66 63 63 60 60 57 63 63 0 60 63 0 60 0 57 0 51 60 45 48 60 60 57 57 60 60 60 0 0 57 60 0 48 51 0 60 63 0 60 60 63 63 60 60 63 0 60 54 60 45 60 60 60 57 60 0 60 54 0 51 48 54 54 54 54 54 54 51 54 54 54 54 51 51 51 45 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="102">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
120.000 120.000 120.000 120.000 120.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 116.667 118.333 120.000 120.000 119.000 118.000 117.000 116.000 115.000 115.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 111.667 113.333 115.000 115.000 112.500 110.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 54 51 51 51 54 0 51 0 51 0 63 60 0 0 0 0 0 0 0 0 63 60 60 0 0 0 0 0 0 0 0 0 0 0 60 63 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 72 72 72 72 72 75 75 75 75 78 78 78 78 78 78 75 75 75 75 75 75 75 75 75 75 75 75 75 75 78 78 78 78 78 78 78 0 0 0 75 75 0 48 72 69 0 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</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" >
89.563 90.0 95.0 100.0 105.0 110.0 113.675 115.0 117.351 120.0 121.026 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 355.554 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.236 1.948 2.509 2.805 2.899 2.777 2.777 2.777 2.865 2.899 3.038 3.239 3.466 3.712 3.967 4.223 4.475 4.722 4.964 5.2 5.432 5.66 5.885 6.108 6.33 6.551 6.772 6.993 7.214 7.437 7.661 7.887 8.115 8.346 8.579 8.815 9.054 9.297 9.544 9.794 10.048 10.306 10.567 10.832 11.099 11.369 11.639 11.908 12.174 12.433 12.681 12.911 13.118 13.293 13.428 13.516 13.55 13.55 13.544 13.524 13.49 13.443 13.384 13.313 13.231 13.139 13.038 12.928 12.811 12.685 12.553 12.415 12.271 12.123 11.969 11.812 11.651 11.487 11.321 11.152 10.982 10.81 10.636 10.462 10.288 10.113 9.938 9.764 9.59 9.416 9.243 9.072 8.901 8.732 8.565 8.399 8.234 8.072 7.911 7.752 7.596 7.441 7.288 7.138 6.99 6.844 6.7 6.559 6.42 6.283 6.149 6.017 5.887 5.759 5.634 5.511 5.391 5.272 5.156 5.043 4.931 4.822 4.714 4.609 4.506 4.406 4.307 4.21 4.115 4.022 3.932 3.843 3.756 3.67 3.587 3.506 3.426 3.348 3.271 3.196 3.123 3.052 2.982 2.914 2.847 2.781 2.717 2.655 2.594 2.534 2.476 2.419 2.363 2.308 2.255 2.203 2.152 2.102 2.053 2.006 1.959 1.914 1.87 1.826 1.784 1.743 1.702 1.663 1.624 1.586 1.55 1.514 1.478 1.444 1.41 1.378 1.346 1.314 1.284 1.254 1.225 1.196 1.168 1.141 1.115 1.089 1.063

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.899" PeakHeight="110.0" Num="3" Error="0.0">
-30.109 12.576 -2.904
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.899" EndFrequency="13.55" PeakHeight="355.554" Num="5" zHalfNm="265.759" Error="4.653">
-205.486 -46.655 21.754 -2.326 -1.815
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.026" Depth="0.122"/>
<TopsideChapman PeakHeight="355.554" PeakDensity="2277946.8" PeakScaleHeight="66.163" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
