<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-07 -066 18:00:00.000"
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="1 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 0 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" >
2026.03.07 (066) 18:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606603071800009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="10.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.468" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.027" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.450" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.610" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.200" 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="24" Val="98.475" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="94.080" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="4.004" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="527.298" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.077" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.212" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="379.919" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="268.128" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.392" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="149.646" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.134" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="80.103" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="185.070" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.290" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="133">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 245.000 246.667 248.333 250.000 250.000 253.000 256.000 259.000 262.000 265.000 265.000 270.000 273.333 276.667 280.000 280.000 285.000 285.000 285.000 287.500 290.000 290.000 295.000 300.000 300.000 302.500 305.000 305.000 307.500 310.000 315.000 315.000 320.000 320.000 320.000 325.000 330.000 331.667 333.333 335.000 340.000 340.000 345.000 350.000 350.000 350.000 352.500 355.000 360.000 365.000 365.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 385.000 395.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 410.000 415.000 415.000 420.000 425.000 427.500 430.000 430.000 435.000 435.000 440.000 440.000 440.000 445.000 450.000 450.000 455.000 455.000 455.000 460.000 460.000 465.000 470.000 470.000 470.000 470.000 470.000 470.000 472.778 475.556 478.333 481.111 483.889 486.667 489.444 492.222 495.000 497.778 500.556 503.333 506.111 508.889 511.667 514.444 517.222 520.000 522.500 527.298 532.480 538.094 544.196 550.851 558.141 566.159 575.020 584.865 595.868 608.245 622.271 638.299
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 0 0 45 45 0 0 48 0 51 48 48 0 0 51 51 51 54 54 0 51 51 0 48 51 0 51 51 0 51 48 54 54 57 57 0 48 0 0 60 54 60 60 51 60 60 0 54 63 60 63 63 63 60 60 60 60 60 63 0 54 57 60 66 60 63 66 66 66 63 63 66 60 69 60 0 60 0 57 66 60 63 60 66 63 66 63 69 63 66 66 69 66 69 60 66 66 66 66 0 63 63 60 66 60 60 54 57 60 60 60 60 57 57 54 54 0 45 48 0 0 45 42 0 48 0 48 0 45 0 42 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -2.734375 0.390625 0.390625 2.734375 -2.734375 -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 -1.953125 -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 -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 -2.734375 0.390625 -1.953125 -0.390625 1.171875 -0.390625 -2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="4">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.45 2.5 2.55 2.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
98.475 99.006 99.581 100.205
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 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
</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" >
90.0 94.08 95.0 96.957 99.833 100.0 102.71 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 379.919 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.61 2.6 2.507 2.507 2.513 2.61 2.666 2.791 2.917 3.047 3.179 3.315 3.454 3.597 3.743 3.892 4.044 4.199 4.356 4.515 4.676 4.838 5.002 5.166 5.331 5.497 5.662 5.828 5.994 6.159 6.324 6.49 6.655 6.819 6.984 7.148 7.312 7.476 7.64 7.804 7.968 8.132 8.296 8.461 8.625 8.789 8.954 9.119 9.283 9.448 9.612 9.775 9.937 10.096 10.252 10.402 10.544 10.674 10.786 10.874 10.931 10.95 10.95 10.946 10.934 10.914 10.886 10.852 10.811 10.764 10.711 10.652 10.588 10.518 10.444 10.366 10.283 10.197 10.107 10.014 9.918 9.819 9.717 9.613 9.507 9.4 9.29 9.179 9.067 8.954 8.84 8.725 8.609 8.493 8.377 8.26 8.143 8.027 7.91 7.794 7.678 7.562 7.447 7.333 7.219 7.106 6.993 6.882 6.771 6.662 6.553 6.445 6.339 6.233 6.129 6.025 5.923 5.822 5.723 5.624 5.527 5.431 5.336 5.243 5.151 5.06 4.97 4.882 4.795 4.709 4.625 4.541 4.459 4.379 4.299 4.221 4.144 4.068 3.994 3.921 3.849 3.778 3.708 3.639 3.572 3.506 3.441 3.377 3.314 3.252 3.191 3.131 3.073 3.015 2.958 2.903 2.848 2.795 2.742 2.69 2.639 2.589 2.54 2.492 2.445 2.399 2.353 2.308 2.265 2.221 2.179 2.138 2.097 2.057 2.018 1.979 1.942 1.904 1.868 1.832 1.797 1.763 1.729 1.696 1.664 1.632 1.6

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.61" PeakHeight="94.08" Num="3" Error="1.625">
-5.972 2.438 -0.546
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.61" EndFrequency="10.95" PeakHeight="379.919" Num="5" zHalfNm="268.128" Error="2.319">
-236.425 -59.892 26.168 -8.765 1.705
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.63" Depth="0.103"/>
<TopsideChapman PeakHeight="379.919" PeakDensity="1487624.1" PeakScaleHeight="80.103" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
