<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 17:30:00.000"
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="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 1 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" >
2026.10.31 (304) 17:30:00</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">
FF202630410311730009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="11.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="4.622" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.768" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.080" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="370.000" 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="11.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="432.452" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.070" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.208" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="331.779" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="174.940" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="240.453" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.991" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="117.544" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="53.346" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="51.005" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="66.792" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="135.880" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.740" Name="B1" QL="/" DL="/" />
<URSI ID="D2" Val="0.330" Name="D1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="59">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
370.000 370.000 370.000 370.000 375.000 377.500 380.000 377.500 375.000 375.000 375.000 380.000 380.000 381.429 382.857 384.286 385.714 387.143 388.571 390.000 392.500 395.000 395.000 395.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 405.000 410.000 415.000 415.000 415.000 420.000 420.000 425.000 430.000 430.000 432.452 435.185 438.249 441.709 445.647 450.168 455.414 461.573 468.907 477.787 488.760 502.663 520.854 545.675 581.560 638.028
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 0 48 0 0 0 0 0 0 0 66 66 0 0 0 0 0 0 66 48 54 0 63 63 63 63 57 63 63 60 0 60 57 57 54 54 57 54 57 57 51 57 54 54 57 57 57 57 57 54 57 57 54 54 51 51 48 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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="8">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 250.000 255.000 260.000 265.000 272.500 280.000 280.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 0 54 54 0 48 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 -0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="189">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.533 90.0 95.0 100.0 105.0 110.0 112.908 115.0 115.817 118.725 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 174.94 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 331.779 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.064 2.657 2.97 3.07 2.948 2.948 2.948 3.07 3.122 3.327 3.523 3.698 3.85 3.984 4.106 4.219 4.328 4.434 4.542 4.622 4.625 4.914 5.212 5.516 5.823 6.128 6.431 6.73 7.024 7.314 7.599 7.879 8.154 8.426 8.692 8.955 9.213 9.468 9.717 9.962 10.201 10.435 10.66 10.877 11.084 11.277 11.453 11.61 11.742 11.845 11.915 11.948 11.95 11.947 11.933 11.906 11.868 11.819 11.76 11.692 11.614 11.529 11.435 11.335 11.227 11.114 10.995 10.872 10.743 10.611 10.475 10.336 10.193 10.049 9.902 9.754 9.604 9.453 9.302 9.149 8.997 8.844 8.691 8.539 8.387 8.236 8.086 7.936 7.788 7.641 7.495 7.35 7.207 7.066 6.926 6.788 6.652 6.517 6.384 6.254 6.125 5.998 5.873 5.75 5.629 5.51 5.393 5.278 5.166 5.055 4.946 4.839 4.734 4.631 4.53 4.431 4.334 4.238 4.145 4.053 3.964 3.876 3.79 3.705 3.623 3.542 3.463 3.385 3.309 3.235 3.162 3.091 3.021 2.953 2.886 2.821 2.757 2.694 2.633 2.573 2.515 2.457 2.402 2.347 2.293 2.241 2.19 2.14 2.091 2.043 1.996 1.951 1.906 1.862 1.82 1.778 1.737 1.697 1.658 1.62 1.583 1.547 1.511 1.476 1.442 1.409 1.377 1.345 1.314 1.284 1.254 1.225 1.197 1.17 1.143 1.116 1.091 1.065 1.041 1.017 0.993 0.971 0.948 0.926 0.905 0.884 0.864

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.07" PeakHeight="110.0" Num="3" Error="0.0">
-30.253 12.787 -3.001
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="3.07" EndFrequency="4.622" PeakHeight="174.94" Num="5" Error="0.0">
-45.512 -16.708 8.244 -2.607 0.368
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="4.622" EndFrequency="11.95" PeakHeight="331.779" Num="5" zHalfNm="240.453" Error="4.614">
-147.125 -15.954 8.148 -2.013 0.105
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.725" Depth="0.122"/>
<TopsideChapman PeakHeight="331.779" PeakDensity="1771743.1" PeakScaleHeight="66.792" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
