<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-18 -077 12:40:00.000"
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 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" >
2026.03.18 (077) 12:40:00</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">
FF202607703181240009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.465" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.648" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="300.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="300.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="405.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.176" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.260" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="390.034" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="239.930" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.233" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="200.194" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="56.785" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="108.029" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="218.830" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.800" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="102">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 305.000 305.000 305.000 305.000 302.500 300.000 305.000 305.000 305.000 305.000 305.000 310.000 310.000 312.500 315.000 315.000 320.000 320.000 320.000 320.000 320.000 322.500 325.000 325.000 327.500 330.000 330.000 330.000 330.000 335.000 335.000 340.000 340.000 340.000 340.000 345.000 347.500 350.000 350.000 350.000 350.000 355.000 355.000 355.000 360.000 362.500 365.000 367.500 370.000 370.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 390.000 395.000 400.000 405.000 405.000 415.000 420.000 420.000 430.000 430.000 435.000 435.000 445.000 450.000 455.000 460.000 460.000 465.000 470.000 475.000 480.000 490.000 495.000 500.000 510.000 515.000 526.154 537.308 548.462 559.615 570.769 581.923 593.077 604.231 615.385 626.538 637.692 648.846 660.000 674.883 690.689 707.508 725.440 744.599
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 48 51 57 60 0 45 54 0 0 54 51 48 54 48 57 60 0 0 51 60 63 54 60 60 48 51 57 57 60 60 63 57 63 63 57 66 0 57 66 69 69 66 66 63 63 0 54 0 54 57 54 48 57 48 57 51 57 54 57 60 60 60 69 60 66 57 66 60 63 66 63 63 57 60 66 66 66 63 63 0 48 45 48 45 45 0 0 0 0 0 0 0 0 0 0 51 51 48 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 -0.390625 -0.390625 2.734375 -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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 -1.953125 0.390625 -1.171875 -1.171875 0.390625 -0.390625 1.171875 2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 2.734375 2.734375 -1.171875
</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" >
89.516 90.0 95.0 100.0 105.0 110.0 112.444 114.887 115.0 117.331 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 390.034 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.136 2.749 3.073 3.176 3.054 3.054 3.06 3.176 3.262 3.403 3.531 3.656 3.779 3.904 4.031 4.163 4.299 4.443 4.593 4.751 4.917 5.09 5.271 5.456 5.646 5.836 6.025 6.212 6.395 6.573 6.745 6.912 7.073 7.229 7.38 7.526 7.667 7.805 7.938 8.068 8.194 8.317 8.437 8.554 8.668 8.78 8.888 8.994 9.097 9.197 9.294 9.388 9.477 9.563 9.643 9.719 9.787 9.848 9.9 9.943 9.974 9.993 10.0 10.0 9.998 9.992 9.982 9.968 9.95 9.929 9.905 9.877 9.846 9.812 9.775 9.735 9.692 9.647 9.599 9.549 9.497 9.443 9.386 9.328 9.268 9.206 9.142 9.077 9.011 8.943 8.874 8.804 8.733 8.661 8.588 8.514 8.439 8.364 8.288 8.211 8.134 8.056 7.979 7.9 7.822 7.743 7.664 7.585 7.506 7.427 7.348 7.269 7.191 7.112 7.033 6.955 6.877 6.799 6.721 6.644 6.567 6.491 6.415 6.339 6.264 6.189 6.114 6.04 5.967 5.894 5.822 5.75 5.679 5.608 5.538 5.468 5.399 5.331 5.263 5.196 5.13 5.064 4.999 4.934 4.87 4.807 4.744 4.682 4.62 4.56 4.5 4.44 4.381 4.323 4.265 4.208 4.152 4.096 4.041 3.987 3.933 3.88 3.828 3.776 3.724 3.674 3.624 3.574 3.525 3.477 3.43 3.382 3.336 3.29 3.245 3.2 3.156 3.112 3.069 3.027 2.985 2.943 2.902 2.862 2.822 2.783

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.176" PeakHeight="110.0" Num="3" Error="0.0">
-30.339 12.913 -3.058
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.176" EndFrequency="10.0" PeakHeight="390.034" Num="5" zHalfNm="239.93" Error="10.51">
-260.396 -19.96 13.9 -11.423 5.176
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.331" Depth="0.122"/>
<TopsideChapman PeakHeight="390.034" PeakDensity="1240694.8" PeakScaleHeight="108.029" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
