<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-25 -084 23:50:00.000"
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 8 0 0 0 0 0 0 0 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44: Problems inverting F-trace to N(h)-profile</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" >
2026.03.25 (084) 23:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608403252350009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="18" >
<URSI ID="00" Val="9.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.039" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.027" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="350.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="350.000" 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="0.750" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="410.000" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.591" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="135">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
350.000 365.000 355.000 375.000 395.000 405.000 412.500 420.000 427.500 435.000 442.500 450.000 455.000 440.000 445.000 450.000 460.000 470.000 470.000 470.000 475.000 475.000 475.000 475.000 476.667 478.333 480.000 480.000 482.500 485.000 485.000 485.000 482.500 480.000 480.000 478.333 476.667 475.000 473.333 471.667 470.000 469.861 469.722 469.583 469.444 469.306 469.167 469.028 468.889 468.750 468.611 468.472 468.333 468.194 468.056 467.917 467.778 467.639 467.500 467.361 467.222 467.083 466.944 466.806 466.667 466.528 466.389 466.250 466.111 465.972 465.833 465.694 465.556 465.417 465.278 465.139 465.000 460.000 457.500 455.000 450.000 450.000 450.000 450.000 450.000 450.000 450.000 450.000 450.000 450.000 450.000 450.000 450.000 450.000 450.000 510.000 502.500 495.000 490.000 485.000 482.500 480.000 465.000 455.000 450.000 450.000 450.000 443.333 436.667 430.000 423.333 416.667 410.000 420.000 412.500 405.000 400.000 400.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 405.000 412.500 420.000 415.000 412.500 410.000 410.000 410.000 410.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 57 57 54 54 0 0 0 0 0 60 60 54 57 57 60 57 0 54 54 0 0 54 0 0 57 63 54 60 57 57 0 57 54 54 0 60 0 0 54 0 0 0 0 54 0 0 0 0 0 51 0 0 0 57 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 48 51 0 54 57 0 0 60 0 0 48 0 0 0 0 0 0 0 57 48 0 51 48 54 0 48 51 57 57 54 60 57 48 54 0 0 54 51 0 57 57 57 63 57 57 57 57 0 54 54 57 51 54 48 0 57 0 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 0.390625 0.390625 0.390625 1.171875 1.171875 -0.390625 -1.171875 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -0.390625 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.953125 -0.390625 2.734375 -1.171875 -1.953125 -1.171875 -1.953125 -0.390625 -0.390625 -1.171875 2.734375 -1.171875 1.953125 1.953125 -2.734375 -1.171875 -1.953125 -0.390625 1.953125 -1.953125 -0.390625 1.953125 0.390625 -2.734375 -1.953125 2.734375 -0.390625 -0.390625 -0.390625 -2.734375 1.953125 -2.734375 0.390625 -1.953125 -0.390625 -2.734375 -1.171875 -1.171875 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 1.953125 -0.390625 -1.171875 1.171875 -2.734375 2.734375 2.734375 -1.953125 -1.171875 -1.171875 -0.390625 -1.953125 -1.953125 -0.390625 -1.171875 -0.390625 -1.171875 1.171875 -0.390625 -1.171875 0.390625 -0.390625 -0.390625 1.953125 1.171875 1.171875 2.734375 2.734375 1.171875 2.734375 0.390625 1.953125 0.390625 0.390625 0.390625 1.171875 1.171875 0.390625 -1.171875 0.390625 -0.390625 1.171875 0.390625 1.171875 1.171875 0.390625 1.171875 0.390625 2.734375 0.390625
</TraceValueList>
</Trace>
</TraceList>
</SAORecord>
</SAORecordList>
