<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-15 -074 17:10:00.000"
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 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" >
2026.03.15 (074) 17:10:00</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">
FF202607403151710009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="33" >
<URSI ID="00" Val="10.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.451" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.719" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="8.200" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="7.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.900" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.060" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="365.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="365.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="105.563" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="115.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="97.507" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="7.336" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="490.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.240" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="7.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="7.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.290" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="372.552" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="239.791" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.149" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.850" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="176.439" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="60.181" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="95.382" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="206.100" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.540" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="7.650" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="66">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
365.000 366.667 368.333 370.000 370.000 375.000 375.000 375.000 375.000 380.000 385.000 385.000 385.000 395.000 400.000 405.000 410.000 411.667 413.333 415.000 420.000 425.000 425.000 430.000 430.000 435.000 440.000 445.000 445.000 450.000 450.000 455.000 460.000 460.000 465.000 465.000 470.000 475.000 475.000 475.000 480.000 485.000 490.000 490.000 495.000 500.000 505.000 510.000 515.000 520.000 525.000 530.000 540.000 545.000 550.000 556.735 564.151 572.358 581.490 591.712 603.232 616.313 631.296 648.629 668.911 692.965
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 0 51 48 51 51 57 48 54 54 54 54 54 54 51 45 0 0 45 48 45 51 48 48 51 48 45 51 48 54 48 45 54 51 57 54 48 54 54 54 57 57 57 54 57 66 69 66 63 57 57 54 54 54 54 54 57 54 54 57 51 60 51 0 0
</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 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="4">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.9 2.95 3.0 3.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
105.563 106.800 108.153 109.648
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 0 0 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -1.953125 1.171875 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="88">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
130.000 130.000 130.000 130.000 130.000 130.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 124.706 124.412 124.118 123.824 123.529 123.235 122.941 122.647 122.353 122.059 121.765 121.471 121.176 120.882 120.588 120.294 120.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 120.000 120.000 120.000 120.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.385 115.769 116.154 116.538 116.923 117.308 117.692 118.077 118.462 118.846 119.231 119.615 120.000 120.000 120.000 120.000 120.000 115.000 115.556 116.111 116.667 117.222 117.778 118.333 118.889 119.444 120.000 120.000 120.000 120.000 120.000 120.000 120.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 48 0 0 51 60 63 63 60 57 57 54 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 48 0 48 51 0 0 0 60 75 75 75 72 69 0 0 0 0 0 0 0 0 0 0 66 66 0 0 0 0 0 0 0 0 45 0 0 0 63 66 63 63 63 63 0 0 0 0 0 0 0 0 51 51 45 48 45 45 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 -0.390625 0.390625 1.171875 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 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>
</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 95.0 97.507 99.679 100.0 101.85 104.022 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 372.552 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.872 3.06 2.945 2.945 2.945 3.06 3.089 3.237 3.389 3.544 3.704 3.867 4.036 4.208 4.384 4.563 4.744 4.927 5.111 5.295 5.478 5.661 5.842 6.022 6.2 6.377 6.551 6.723 6.893 7.061 7.227 7.391 7.554 7.714 7.873 8.03 8.186 8.34 8.493 8.644 8.793 8.942 9.088 9.233 9.376 9.517 9.656 9.793 9.926 10.056 10.182 10.302 10.416 10.523 10.621 10.707 10.78 10.837 10.877 10.897 10.9 10.899 10.894 10.882 10.866 10.844 10.817 10.786 10.75 10.709 10.664 10.616 10.563 10.507 10.448 10.385 10.319 10.251 10.179 10.105 10.029 9.95 9.869 9.787 9.702 9.616 9.529 9.439 9.349 9.258 9.165 9.072 8.977 8.882 8.787 8.691 8.594 8.497 8.4 8.303 8.205 8.107 8.01 7.912 7.815 7.718 7.621 7.525 7.428 7.333 7.237 7.142 7.048 6.954 6.861 6.768 6.676 6.585 6.495 6.405 6.316 6.227 6.14 6.053 5.967 5.882 5.798 5.714 5.632 5.55 5.469 5.389 5.31 5.232 5.155 5.078 5.003 4.928 4.854 4.782 4.71 4.639 4.569 4.499 4.431 4.364 4.297 4.231 4.167 4.103 4.04 3.977 3.916 3.855 3.796 3.737 3.679 3.622 3.565 3.51 3.455 3.401 3.348 3.295 3.243 3.192 3.142 3.093 3.044 2.996 2.949 2.902 2.856 2.811 2.766 2.722 2.679 2.637 2.595 2.553 2.513 2.473 2.433 2.394 2.356 2.319 2.282

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.06" PeakHeight="97.507" Num="3" Error="2.645">
-11.094 4.686 -1.099
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.06" EndFrequency="10.9" PeakHeight="372.552" Num="5" zHalfNm="239.791" Error="2.508">
-248.748 -33.93 20.756 -8.248 1.64
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.515" Depth="0.115"/>
<TopsideChapman PeakHeight="372.552" PeakDensity="1474069.5" PeakScaleHeight="95.382" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
