<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-28 -301 19:40:00.000"
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="14.0">
<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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: F2x cusp not found, 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" >
2026.10.28 (301) 19:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202630110281940009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.596" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.781" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="420.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="420.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="460.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.207" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="366.695" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="258.945" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.471" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="149.729" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="48.300" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="79.707" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="159.100" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.850" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="41">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
420.000 420.000 420.000 425.000 425.000 430.000 432.500 435.000 435.000 435.000 440.000 440.000 442.500 445.000 450.000 450.000 455.000 460.000 460.000 460.000 460.000 460.000 460.000 465.000 470.000 475.000 480.000 485.000 490.000 495.000 500.000 510.000 516.236 523.591 532.396 543.125 556.489 573.591 596.257 627.730 674.378
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 60 66 0 63 69 66 0 66 60 66 0 63 0 0 0 63 63 63 63 63 63 60 60 60 60 60 60 57 54 54 48 45
</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
</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" >
89.705 90.0 95.0 100.0 105.0 110.0 115.0 117.093 120.0 124.185 125.0 130.0 131.278 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 366.695 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.225 1.48 1.911 2.136 2.207 2.144 2.078 2.078 2.078 2.093 2.184 2.207 2.321 2.478 2.638 2.804 2.977 3.156 3.344 3.539 3.741 3.951 4.166 4.387 4.613 4.842 5.074 5.308 5.543 5.778 6.013 6.247 6.479 6.71 6.94 7.167 7.391 7.613 7.831 8.047 8.258 8.466 8.669 8.868 9.061 9.248 9.429 9.602 9.767 9.922 10.067 10.201 10.321 10.427 10.517 10.591 10.646 10.682 10.699 10.7 10.698 10.689 10.672 10.648 10.616 10.578 10.534 10.483 10.427 10.366 10.299 10.228 10.152 10.072 9.989 9.901 9.81 9.717 9.62 9.521 9.42 9.316 9.211 9.104 8.995 8.885 8.774 8.662 8.549 8.436 8.322 8.208 8.093 7.979 7.864 7.75 7.635 7.521 7.408 7.295 7.182 7.07 6.959 6.849 6.739 6.631 6.523 6.416 6.31 6.205 6.101 5.999 5.897 5.797 5.698 5.6 5.503 5.407 5.313 5.22 5.128 5.038 4.948 4.86 4.773 4.688 4.604 4.521 4.439 4.358 4.279 4.201 4.124 4.049 3.974 3.901 3.829 3.759 3.689 3.621 3.553 3.487 3.422 3.358 3.295 3.234 3.173 3.113 3.055 2.997 2.941 2.885 2.831 2.777 2.725 2.673 2.622 2.573 2.524 2.476 2.429 2.382 2.337 2.292 2.249 2.206 2.164 2.122 2.082 2.042 2.003 1.964 1.927 1.89 1.853 1.818 1.783 1.749 1.715 1.682 1.65 1.618 1.587 1.556 1.526 1.497 1.468

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.207" PeakHeight="110.0" Num="3" Error="0.0">
-29.363 11.518 -2.45
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.207" EndFrequency="10.7" PeakHeight="366.695" Num="5" zHalfNm="258.945" Error="1.872">
-228.997 -11.086 7.318 -3.757 1.105
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="21.278" Depth="0.129"/>
<TopsideChapman PeakHeight="366.695" PeakDensity="1420471.5" PeakScaleHeight="79.707" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
